hexa-comb. form

1878 C. T. Kingzett Animal Chem. 101 Stadeler..constructed upon them the theory of bilirubin as a hexabasic acid.

1880 H. E. Armstrong & C. E. Groves Miller's Elem. Chem. (ed. 6) iii. i. 300 The hexabromide C₆H₆Br₆ can readily be obtained.

1870 G. Rolleston Forms Animal Life 251 The..hexacanth embryo..has become greatly distended.

1897 T. C. Allbutt et al. Syst. Med. II. 1008 The embryo of the cestodes is provided with six hooklets (hence the term ‘hexacanth’).

1854 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Hexacanthus..having six rays..six-rayed: hexa~canthous.

1775 J. Ash New Dict. Eng. Lang. Hexacapsular, having six seed vessels.

1866 W. Odling Lect. Animal Chem. 109 Hexacarbon compounds such as amido-caproic acid or leucine.

1886 New Sydenham Soc. Lexicon Hexacetodextrin, a substance obtained when starch is heated to 160° C. with acetic anhydride.

1880 E. Cleminshaw tr. C. A. Wurtz Atomic Theory 233 The hexachloride of ruthenium is unknown.

1885 I. Remsen Introd. Study Compounds of Carbon 253 As the final products, hexa-chlor-benzene, C₆Cl₆, and hexa-brom-benzene C₆Br₆ are obtained.

1961 Lancet 22 July 176/2 Recently, several thousand cases of human porphyria have been seen in Turkey after the consumption of wheat containing 0·1–0·2% of hexachlorobenzene.

1908 Chem. Abstr. 2 793 Hexachlorcyclohexanes.—On continuing the action of chlorine in the sunlight, a viscous liquid is obtained.

1945 R. E. Slade Gamma Isomer of Hexachlorocyclohexane (‘Gammexane’) 11 The hexachlorocyclohexanes possess considerable chemical stability.

1898 Jrnl. Chem. Soc. 74 i. 626 When a current of chlorine is passed into a mixture of pentachlorethane and aluminium chloride heated at 100°, hexachlorethane is obtained.

1936 Discovery Aug. 255/2 A new way of killing mosquitoes..involves the use of hexachloroethane.

1960 Farmer & Stockbreeder 16 Feb. 109 (advt.) In the Nicholas Liver Fluke Drench, hexachloroethane particles are suspended in a free-flowing liquid and this ensures accurate dosing. Result: greater fluke kill than ever before!

1892 Jrnl. Soc. Chem. Industry 11 599/1 It is usually assumed that the benzene-hexachlorides are derivatives of the hydrocarbon hexamethylene.

1960 Which? Feb. 32/2 One can attempt to prevent the sweat from decomposing by using an antiseptic, such as hexachlorophane.

1948 Jrnl. Amer. Med. Assoc. 14 Feb. 471/2 The Council [on Pharmacy and Chemistry] considered the proposal of a pharmaceutical manufacturer for the use of the term hexachlorophene as a generic designation for bis(2-hydroxy-3,5,6-trichlorophenyl) methane... The Council voted to recognize hexachlorophene as the generic, or common, designation.

1953 Jrnl. Parasitol. 39 79 Hexachlorophene..is effective in removing Raillietina cesticillus from chickens.

1866 W. Odling Lect. Animal Chem. 66 Hexa~compounds, including caproic acid, leucine, and grape sugar.

1877 T. H. Huxley Man. Anat. Invertebrated Animals 165 Another tabulate coral, Pocillopora, is a true Hexacorallan.

1886 R. von Lendenfeld in Proc. Zool. Soc. 590 The Recent Families of Sponges... With hexact spicules and thimble-shaped chambers.

1887 tr. F. E. Schulze in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXI. 29 Regular Hexacts are all spicules in which the rays lie at right angles to one another, and are of equal length and similar form.

1940 L. H. Hyman Invertebrates I. vi. 327 They [sc. triacts] may show their origin from a hexact by the presence near the middle of knobs or branches of the axial fibre.

1887 Encycl. Brit. XXII. 417 Modifications of the triaxon hexactine type.

1900 E. A. Minchin in E. R. Lankester Treat. Zool. II. iii. 117 One or more rays of the hexactine..may become modified in various ways.

1940 L. H. Hyman Invertebrates I. vi. 327 The basic regular hexactine consists of three axes crossing at right angles, forming six rays of approximately equal length.

1887 tr. F. E. Schulze in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXI. 37 Certain Hexactinellidan families have typical and regular Uncinata, while in others they are absent.

1877 Athenæum 1 Dec. 703/1 Of hexactinian corals.

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 554 Polycarpæ. Flowers pentacyclic or hexacyclic.

1880 R. A. Proctor Rough Ways 213 The descendants of four grandparents of whom one only was hexadactylic.

1828 N. Webster Amer. Dict. Eng. Lang. Hexadactylous, having six toes.

1914 Jrnl. Chem. Soc. 105 ii. 2251 Acetate of l-γ-Hexadecanol, C₂H₅·CH(O·CO·CH₃)·C₁₃H₂₇.

1964 Oceanogr. & Marine Biol. 2 177 The higher aliphatic alcohols of the wax esters [found in fish lipids] usually contain hexadecanol (cetyl alcohol) and octadec-9-enol (oleyl alcohol) as main components.

1901 Jrnl. Chem. Soc. 80 i. 252 The product was found to yield a hexadecenoic acid, C₁₆H₃₀O₂, melting at 36°, when fused with potassium hydroxide.

1948 A. W. Ralston Fatty Acids ii. 98 The fats of fresh water fish contain somewhat less 9-hexadecenoic acid than those of marine origin.

1807 J. Robinson Archæol. Græca v. xxvi. 548 Pentadrachms and hexadrachms.

1946 Jrnl. Econ. Entomol. 39 812/1 Hexaethyl tetraphosphate merits considerable attention as a commercial control for numerous insects causing serious damage to agricultural and garden crops.

1951 A. W. Johnson et al. in E. H. Rodd Chem. Carbon Compounds I a. iv. 342 A mixture of phosphates, known commercially as ‘hexaethyl tetraphosphate’, is formed when POCl₃ reacts with triethyl orthophosphate or with ethanol.

1965 A. Grollman & E. F. Grollman Pharmacol. & Therapeutics (ed. 6) xxxi. 823 Hexaethyltetraphosphate..is highly toxic, exerting a potent anticholinesterase action.

1862 S. Kens. Spec. Exhib. vi. 58 A vertical central stem rising from a wide hexafoil-shaped base.

1895 Athenæum 13 Apr. 480/3 A small mediæval paten..sunk in hexafoil.

1884 P. Schaff et al. Relig. Encycl. III. 2299 The hexaglot edition of the Psalter published at Rostock, 1643.

1867 W. A. Miller Elements Chem. (ed. 4) III. 325 Hexaglyceric bromhydrin.

1908 H. C. Cooper tr. A. F. Holleman Text-bk. Inorg. Chem. (ed. 3) 487 Two hexahydrates of chromic chloride, CrCl₃·6H₂O, are known.

1951 C. Palache et al. Dana's Syst. Mineral. (ed. 7) II. 493 [Pentahydrite is] obtained in crystals together with the hexahydrate and tetrahydrate by evaporation..of a solution of magnesium sulfate.

1880 G. Lunge Theoret. & Pract. Treat. Manuf. Sulphuric Acid & Alkali II. iii. i. 277 (heading) Hexahydrated salt has been obtained by Mitscherlich from a solution of Na₂S in the air.

1951 C. Palache et al. Dana's Syst. Mineral. (ed. 7) II. 493 The minerals of this group..are isostructural with the monoclinic artificial hexahydrated sulfates and selenates of Mg, Co, Ni, and Zn.

1885 Jrnl. Chem. Soc. 48 ii. 1046 (heading) Reduction in hexahydric alcohols.

1964 N. G. Clark Mod. Org. Chem. xvi. 315 The product, sorbitol, is a hexahydric alcohol (one of the ‘sugar alcohols’), which occurs naturally in many fruits.

1913 V. B. Lewes Oil Fuel 41 In the Russian oils the more important members belong to the series of hydrocarbons known as naphthenes or hexahydrides, in which the ratio of carbon to hydrogen is CⁿH_2n.

1905 Rep. Brit. Assoc. Aug.–Sept. 156 Small quantities are decomposed into hexahydrobenzene and a fatty amine.

1885 Jrnl. Chem. Soc. 48 ii. 780 The action of acetic anhydride and fused sodium acetate on the hexahydroxybenzene.

1889 H. F. Morley & M. M. P. Muir Watts' Dict. Chem. Hexa-Icosane..a soft waxy substance found among the products of the distillation of cerotic acid.

1880 H. E. Armstrong & C. E. Groves Miller's Elements Chem. (ed. 5) III. 751 Normal primary hexaldehyde..obtained by the distillation of a mixture of calcic normal hexylate and calcic formate.

1881 Athenæum 22 Jan. 134/3 Mr Scott's hexalogy closes with what we may call a satiric chapter on cubic determinants.

1953 R. G. R. Bacon in E. H. Rodd Chem. Carbon Compounds II a. xi. 403 A mixture of polymers..was separated, by means of a molecular still, into fractions ranging from trimers to hexamers.

1969 Nature 1 Nov. 493/2 The insulin hexamer..is a compact, oblate spheroid, formed by the coordination of three insulin dimers around the two zinc ions.

1940 Jrnl. Chem. Soc. 1169 The trimeric, tetrameric, and pentameric portions of the polymeride have been separated from one another by molecular distillation, leaving as residue a highly viscous liquid of mainly hexameric complexity.

1903 Science 17 July 80/2 In some species [of corals] the hexamerism becomes much obscured in later stages, while in others it is more or less distinctly preserved.

1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 159 The finally hexamerous Anthozoon passes through a tetramerous and an octomerous stage.

1905 I. B. Balfour tr. C. E. von Goebel Organogr. Plants II. 538 The first flowers of some Caryophylleae are hexamerous.

1940 L. H. Hyman Invertebrates I. vii. 579 In typical hexamerous anemones, the number of pairs of septa in the various cycles is then: 6 (primaries), 6, 12, 24, 48, etc.

1891 W. Ramsay Syst. Inorg. Chem. xxiii. 370 Hexametaphosphates.—These are the salts prepared by the usual methods from ordinary metaphosphoric acid.

1892 Jrnl. Chem. Soc. 62 ii. 1050 The uncrystallisable hexametaphosphates, Na₆(PO₃)₆ and Ag₆(PO₃)₆, are obtained from Graham's soluble sodium metaphosphate.., which is a mixture of the foregoing sodium salt with several other hexametaphosphates.

1963 A. J. Hall Student's Handbk. Textile Sci. vi. 292 Important sequestering agents..include sodium pyrophosphate Na₄P₂O₇, and especially hexametaphosphate (NaPO₃)₆.

1949 Jrnl. Pharmacy & Pharmacol. 1 603 An antidote exists for decamethonium iodide in hexamethonium iodide..and..this substance has been suggested for use in hypertension and vascular diseases.

1964 S. Duke-Elder Parsons' Dis. Eye (ed. 14) xxi. 300 The operation is most conveniently done under basal anæsthesia, and the systemic administration of sympatholytic drugs such as hexamethonium may be of value in relieving congestion by lowering the general blood pressure.

1909 Practitioner Dec. 798 The drug is hexamethylenamine, and it has been experimentally shown that a short time after its administration by the mouth its presence can be demonstrated in the cerebro-spinal fluid.

1887 Abstr. Proc. Chem. Soc. 3 96 Hitherto all attempts to synthesise hexamethylene-derivatives have been unsuccessful.

1909 C. A. Keane Mod. Org. Chem. v. 64 The six carbon atom analogue of these alicyclic compounds is hexamethylene, C₆H₁₂.

1894 Jrnl. Chem. Soc. 66 i. 410 Hexamethylenediamine nitrite.

1896 Jrnl. Chem. Soc. 70 i. 464 Hexamethylenediamine, C₆H₁₂(NH₂)₂, melts at 40° and boils at 192–195°.

1962 J. K. Stille Introd. Polymer Chem. vi. 93 Nylon 66 is formed from the reaction of adipic acid (a six-carbon dibasic acid) and hexamethylenediamine (a six-carbon diamine).

1888 Jrnl. Chem. Soc. 54 1268 A well-cooled solution of hexamethylenetetramine.

1940 Thorpe's Dict. Appl. Chem. (ed. 4) IV. 27/2 The inodorous solid product, hexamethylenetetramine, C₆H₁₂N₄ (hexamine, urotropine), is a serviceable antiseptic in cystic affections, and is administered to typhoid ‘carriers’ to destroy the bacilli of the disease in the urine.

1961 Encycl. Brit. IX. 524/1 Nitration of hexamethylenetetramine gives the explosive, RDX.

1907 Practitioner Aug. 327 This is a salt built up of citric acid, hexamethylenetetramine, and formaldehyde.

1914 Brit. Pharmacopœia 171 Hexamine may be obtained by the interaction of ammonia with formic aldehyde.

1956 Ld. Amulree in A. Pryce-Jones New Outl. Mod. Knowl. 222 Others have used hexamine with glucose and vitamin B₁ but this treatment, again, does not seem to be generally applicable [in cases of senile dementia].

1854 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Hexanemus ..Having six threads..six-armed: hexanemous.

1813 J. M. Good et al. Pantologia Hexapetaloid Corol, in botany, divided so near to the base as to have the appearance of a six-petalled corol, but in reality one-petalled, as in agapanthus.

1845 J. Lindley School Bot. (1858) viii. 129 Flowers hexapetaloid, irregular.

1830 J. Lindley Introd. Nat. Syst. Bot. 252 Some of them have both the calyx and corolla equally formed, and coloured so as to be undistinguishable, unless by the manner in which those parts originate: these constitute the hexapetaloideous form.

1707 H. Sloane Voy. Islands I. Pref. I have followed mostly the Method of Mr. Ray in his History of Plants, joining his Genera or Tribes together by the Method of Rivinus, or Number of the Petala or Leaves of the Flowers; As those which are Monopetalous first, those Dipetalous next, then the Tripetalous, Tetrapetalous, Pentapetalous, Hexapetalous, and such as have no exact Numbers of Coloured Leaves in their Flowers.

1727 N. Bailey Universal Etymol. Eng. Dict. II Hexa~petalous, composed of 6 leaves, as the Filix, Pulsatilla, etc.

1753 Chambers's Cycl. Suppl. at Hemerocallis The flower is hexapetalous.

1775 J. Ash New Dict. Eng. Lang. Hexaphyllous.

1875 Encycl. Brit. II. 411 The propylæum..as applied to the Acropolis..consists of a Doric hexaprostyle portico internally.

1854 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Hexapterus (Bot.), provided with six wings, as the capsule of the Fritillaria imperialis. (Entomol.), applied to the Phalæna hexaptera, because the male seems to have a third pair of small wings..six-winged: hexapterous.

1900 B. D. Jackson Gloss. Bot. Terms 123/2 Hexarch.

1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. vii. 352 It is customary to discriminate between diarch, tetrarch, pentarch, hexarch and polyarch bundles.

1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) i. iv. 170 Pentarch..and hexarch roots also occur.

1799 S. Turner Hist. Anglo-Saxons I. ii. vi. 272 [Ethelfrith] converted the Saxon States in England into an hexarchy.

1888 F. H. Hill G. Canning xxiii. 217 The Concert of Europe..a despotic hexarchy of States.

1861 R. Bentley Man. Bot. i. iv. 224 A polysepalous calyx may consist of two or more parts..hexasepalous..six.

1921 A. F. Blakeslee in Amer. Naturalist 55 259 The following terms are suggested to designate sets with numbers of chromosomes from 1 to 12: monosome, disome, trisome, tetrasome, pentasome, hexasome, heptasome, oktasome, enneasome, dekasome, hendekasome, dodekasome.

1922 Genetics 7 527 If..the chromosomes of a tetrasomic or hexasomic set assort at random in an F₁ hybrid a 35:1 or 399:1 ratio will be found in the F₂.

1930 Jrnl. Genetics 22 146 Doubly and trebly hexasomic tetraploids are more likely to come from the derivatives of a tetraploid-hexaploid cross.

1955 J. B. Hill & H. D. Hill Genetics & Human Heredity xviii. 363 Hexasomic tetraploid Globe: 4x + 21·22 + 21·22.

1863 R. Townsend Chapters on Mod. Geom. I. 145 In a hexastigm or hexagram every triangle determined by three points or lines is said to be the opposite of that determined by the remaining three.

1896 Academy 28 Mar. 261/3 To render the Alcaic metre..by two decasyllabic, one hexasyllabic, and one octosyllabic line.