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diplo-|ˈdɪpləʊ|
before a vowel dipl-, combining form of Gr. διπλό-ος, διπλοῦς twofold, double, occasional in ancient Greek, now used in many scientific terms; e.g. diplaˈcusis Path. [Gr. ἄκουσις hearing], double hearing, the hearing of two notes when only one is produced, due to the hearing of a different tone in each ear, or to the arousing of two tonal sensations in the same ear. ˌdiplobaˈcillus (see quot. 19571). diplobacˈteria n. pl., bacteria consisting of two cells, or adhering in pairs. diploˈblastic a. Biol., having two germinal layers, the hypoblast and epiblast. diploˈcardiac a. Zool., having the heart double, i.e. with the right and left halves completely separate, as birds and mammals. diploˈcephaly, monstrosity consisting in having two heads. diploˈconical a., of the form of a double cone. ˈdiplodal a. Zool. [Gr. ὁδ-ός way + -al1], of sponges, having both canals, prosodal (of entrance) and aphodal (of exit) well developed. ˈdiplodoxy nonce-wd. (see quot.). diploˈgangliate a., having ganglia arranged in pairs; said of a division of animals (Diplogangliata) nearly equivalent to Cuvier's Articulata. diploˈgenesis, (a) the production of double organs or parts instead of single ones; the formation of a double monster; (b) the supposed change of germ plasm produced by changes due to environment, bringing about inheritance of acquired characteristics; hence diplogeˈnetic a.; diploˈgenic a., ‘producing two substances; partaking of the nature of two bodies’ (Craig 1847). ˈdiplograph (see quot.); so diploˈgraphic, diploˈgraphical a., of or pertaining to writing double; also diˈplography. diploˈhaplont Biol., an organism whose life-cycle embraces a diploid and a haploid phase; so diplohaˈplontic a. diploˈneural a. Anat., supplied by two nerves of separate origin, as a muscle; diploneuˈrose a. Zool., belonging to the Diploneura (Grant's term for the Articulata, as having a double nerve-cord running along the body); diploˈneurous a., ‘having two nervous systems; also, belonging to the Diploneura’ (Syd. Soc. Lex.). diplopeˈristomous a. Bot., of mosses, having a double peristome, or fringe round the mouth of the capsule. ˈdiplophase Biol. [a. G. diplophase], the phase in the lifecycle of an organism when the nuclei are diploid. diploˈplacula Embryol., a placula composed of two layers resulting from transverse fission; hence diploˈplacular, diploˈplaculate a. ˈdiplopod a. and n. Zool., belonging to the order Diplopoda (= Cheilognatha) of Myriapods, having two pairs of limbs on each segment of the body; a member of this order; hence diˈplopodous a. ˈdiplopore Zool., any of the pores that occur in pairs on the surface of the theca of certain cystoids (order Diploporita); also, a thecal canal that ends in one of these pores. diˈplopterous a. Entom., belonging to the family Diploptera (the true wasps) in Latreille's classification of insects, which have the fore wings folded when at rest. diplosˈphenal a., ˈdiplosphene, Anat. = hyposphenal, hyposphene. diplosponˈdylic a. Zool., said of a vertebral segment having two centra, or of a vertebral column having twice as many centra as arches, as in fishes and batrachians; hence diploˈspondylism, the condition of being diplospondylic. diˈplostichous a., arranged in two rows, as the eyes of certain spiders. diploˈsyntheme = disyntheme.
1890Billings Med. Dict. 400/2 Diplakousis or Diplacusis. 1895E. B. Titchener tr. Külpe's Outl. Psychol. 299 The abnormality (diplacusis) may be restricted to a single ear. 1970J. V. Tobias Found. Mod. Auditory Theory I. x. 391 One possible explanation for diplacusis is distortion.
1901Jrnl. Exper. Med. V. 213 The occurrence of acid-resisting diplococci or diplo-bacilli. 1908Practitioner Feb. 203 The diplobacillus of Morax-Axenfeld. 1957M. B. Jacobs et al. Dict. Microbiol. 78/2 Diplobacilli, bacillus-type bacteria occurring in pairs, as, for example, Moraxella lacunata. 1957Bergey's Man. Determinative Bacteriol. (ed. 7) 419 Genus VII. Moraxella... Small rod-shaped cells which occur as diplobacilli.
1888F. P. Billings in Amer. Nat. XXII. 123 We may find two apparently mature organisms enclosed in a common capsule..These diplo-bacteria may assume a curved or sausage shape.
1854–67C. A. Harris Dict. Med. Terminol., Diplocardiac, having a double heart.
1847Craig, Diplocephalia. 1883Syd. Soc. Lex., Diplocephaly, in Teratology, the condition of a fœtus having two heads on one body.
1887W. J. Sollas in Encycl. Brit. XXII. 415/1 This, which from the marked presence of both prosodal and aphodal canals may be termed the diplodal type of the Rhagon canal system, occurs but rarely.
1851Fraser's Mag. XLIII. 289 An orthodoxy with two tails—or a diplo⁓doxy—to coin a word—which affirms the co-existence of two separate beliefs, while it expresses no dogma as to the truth of either.
1851Richardson Geol. viii. 257 The nervous system is composed of a chain of ganglia disposed in pairs, and united by nervous cords: hence the term diplo⁓gangliata.
1835–6Todd Cycl. Anat. I. 509/1 That form of monstrosity..called Diplogenesis. 1878Bartley tr. Topinard's Anthrop. v. 162 Diplogenesis, in which the whole body is more or less double. 1896Nat. Sci. Nov. 288 Cope's theory of Diplogenesis.
1876Catal. Sci. App. S. Kens. No. 2052 Diplograph. Writing machine for the Blind, by which writing in relief and ordinary writing are performed at the same time.
1823J. Elmes Mem. & Life C. Wren 23 In 1647..he had a patent granted him for seventeen years, for a diplographic instrument for writing with two pens.
1750C. Wren Parentalia 212 He [Wren] invented the art of double writing..by an instrument called the Diplographical Instrument. 1758Grand Mag. of Mag. Nov., In 1647, about three years before Mr. Wren publicly produced his diplographical instruments.
1824Mech. Mag. No. 60. 59 Diplography.
1921Bot. Abstr. VI. 251 (heading) Genetical phenomena and taxonomy in haplonts and diplohaplonts in the vegetable kingdom. 1938Bot. Rev. IV. 136 Diplohaplonts with unlike alternating generations are common among the Phaeophyceae. Ibid. 137 A lifecycle identical with that of the diplohaplontic Phaeophyceae with dissimilar generations has been described for Stigeoclonium. 1965Bell & Combe tr. Strasburger's Textbk. Bot. (new ed.) i. i. 36 In many of the more highly developed algae..the diploid zygote grows first into a multicellular diploid plant, the sporophyte. After the development of numerous diploid spore-mother cells meiosis takes place freely. Thus from the original nuclear fusion..a multitude of haploid cells (gonospores) are produced. These organisms are termed diplohaplonts.
1836–9Todd Cycl. Anat. II. 412/2 Belonging to the diploneurose..divisions of the animal kingdom.
1870Bentley Bot. 369 With two rows, they are diploperistomous.
1925E. B. Wilson Cell (ed. 3) 1130 Diplophase, that phase of the life-history, particularly in the antithetic alternation of generations, in which the nuclei are haploid, as in the sporophyte. 1965J. Wilkinson tr. Langeron's Outl. Mycology (ed. 2) ix. 374 Meiosis intervenes between the diplophase and the haplophase, fertilization between the haplophase and the diplophase.
1884A. Hyatt in Proc. Boston Soc. Nat. Hist. XXIII. 89 In this way the primitive differentiation of the placula into two layers is established in what we have designated the diploplacula.
1864Webster, Diplopod (Zool.), one of a group of myriapods. 1883Smithsonian Inst. Rep., Zool. (Cent. Dict.), One of the diplopod myriopods.
1899,1962Diplopore [see haplopore s.v. haplo-].
1884O. C. Marsh Amer. Jurassic Dinosaurs in Amer. Jrnl. Sc. CXXVII. 334 In Ceratosaurus..These vertebræ show the diplosphenal articulation seen in Megalosaurus. 1888Rolleston & Jackson Anim. Life 525 The lateral eyes in Scorpionidæ and all the eyes of Limulus are monostichous; the central eyes of the former group and other Arachnids, so far as known, diplostichous. |