spiculumn.

/ˈspɪkjʊləm/

Forms: Plural spicula.

Etymology: < Latin spīculum sharp point, sting, dart, etc., diminutive of spīca spike n.²

1. = spicula n. 1a, 1b.

ΘΚΠ

the world > matter > chemistry > crystallography (general) > crystal (general) > crystal habit > [noun] > needle

needle1676

spiculum1746

spicula1747

needle-tin1882

1746 R. James in Moffett & Bennet's Health's Improvem. (new ed.) Introd. 22 Another Class of Medicines..consists of such Substances as sheath the Spicula, or sharp Points of the Acid.

1839 C. Darwin in R. Fitzroy & C. Darwin Narr. Surv. Voy. H.M.S. Adventure & Beagle III. xvii. 398 We were enveloped in a cloud which was falling, under the form of minute frozen spicula.

1863 S. Baring-Gould Iceland 119 Composed of minute spicula of ice.

figurative and in extended use.1840 J. B. Fraser Trav. Koordistan II. vi. 146 The wind was..loaded with spicula of cold, which penetrated every limb and joint.1850 R. W. Emerson Swedenborg in Representative Men iii. 107 His style lustrous with points and shooting spicula of thought.

a. Zoology. A sharp-pointed process or formation.

ΘΚΠ

the world > animals > animal body > general parts > [noun] > slender or pointed part > sharp

spiculum1762

spicule1861

1762 P. Murdoch tr. A. F. Büsching New Syst. Geogr. I. 236 Some whales have Spicula in their jaws, as those of Greenland, the Nordcaper, the Fin Fish.

1844 R. W. Emerson Nature in Ess. (1901) 2nd Ser. 313 It publishes itself in creatures, reaching from particles and spicula..to the highest symmetries.

1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 78 Crowded with microscopic calcareous spicula.

1859 J. Tomes Syst. Dental Surg. (1873) 5 Projecting inwards from the free edge of the outer and inner alveolar walls, we observe small spicula.

b. The excitatory dart in snails.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > order Pulmonifera > member of > parts of > dart

spiculum1838

1838 Penny Cycl. XII. 105/2 Dr. Maton often observed these spicula, but never saw them actually projected from one to the other.

1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 190 Male genital organ a double spiculum.

1866 R. Tate Plain & Easy Acct. Mollusks Great Brit. iv. 119 The snails are furnished with spicula—crystalline darts, which they eject at each other.

3. One of the calcareous or siliceous needles found in sponges. Usually in plural.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > sponge spicule

spiculum1842

spicula1845

spicule1846

needle1870

1842 Penny Cycl. XXII. 376/1 The calcareous and silicious spicula, and the formation and distribution of the pores and orifices of sponges.

1865 P. H. Gosse Land & Sea 266 These spicula or needles..make up the firm portion of the Sponge.

1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 114 A multitude of separate spicula, composed of an animal substance..impregnated with carbonate of lime.

attributive.1883 W. Saville-Kent Fisheries Bahamas 33 In a third group, that of the Calcispongiæ, a spicula skeleton is likewise developed.

4. = spicula n. 4.

ΘΚΠ

the world > life > the body > structural parts > bone or bones > parts of bones > [noun] > natural outgrowth or projecting part

process1565

production1578

apophysis1611

processus1664

probole1684

spine1706

ramus1731

spinous process1732

plectrum1792

buttress1824

epicondyle1828

spiculum1873

1873 St. G. Mivart Lessons Elem. Anat. iii. 116 The malar bone..may be merely a delicate spiculum of bone.

1874 G. Lawson Dis. Eye (ed. 2) 68 To detect a fine spiculum of steel, or a fragment of glass,..which may have been impacted on the cornea.

This entry has not yet been fully updated (first published 1914; most recently modified version published online September 2018).

单词	spiculum
释义	spiculumn. /ˈspɪkjʊləm/ Forms: Plural spicula. Etymology: < Latin spīculum sharp point, sting, dart, etc., diminutive of spīca spike n.² 1. = spicula n. 1a, 1b. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > crystal habit > [noun] > needle needle1676 spiculum1746 spicula1747 needle-tin1882 1746 R. James in Moffett & Bennet's Health's Improvem. (new ed.) Introd. 22 Another Class of Medicines..consists of such Substances as sheath the Spicula, or sharp Points of the Acid. 1839 C. Darwin in R. Fitzroy & C. Darwin Narr. Surv. Voy. H.M.S. Adventure & Beagle III. xvii. 398 We were enveloped in a cloud which was falling, under the form of minute frozen spicula. 1863 S. Baring-Gould Iceland 119 Composed of minute spicula of ice. figurative and in extended use.1840 J. B. Fraser Trav. Koordistan II. vi. 146 The wind was..loaded with spicula of cold, which penetrated every limb and joint.1850 R. W. Emerson Swedenborg in Representative Men iii. 107 His style lustrous with points and shooting spicula of thought. 2. a. Zoology. A sharp-pointed process or formation. ΘΚΠ the world > animals > animal body > general parts > [noun] > slender or pointed part > sharp spiculum1762 spicule1861 1762 P. Murdoch tr. A. F. Büsching New Syst. Geogr. I. 236 Some whales have Spicula in their jaws, as those of Greenland, the Nordcaper, the Fin Fish. 1844 R. W. Emerson Nature in Ess. (1901) 2nd Ser. 313 It publishes itself in creatures, reaching from particles and spicula..to the highest symmetries. 1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 78 Crowded with microscopic calcareous spicula. 1859 J. Tomes Syst. Dental Surg. (1873) 5 Projecting inwards from the free edge of the outer and inner alveolar walls, we observe small spicula. b. The excitatory dart in snails. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > order Pulmonifera > member of > parts of > dart spiculum1838 1838 Penny Cycl. XII. 105/2 Dr. Maton often observed these spicula, but never saw them actually projected from one to the other. 1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 190 Male genital organ a double spiculum. 1866 R. Tate Plain & Easy Acct. Mollusks Great Brit. iv. 119 The snails are furnished with spicula—crystalline darts, which they eject at each other. 3. One of the calcareous or siliceous needles found in sponges. Usually in plural. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > sponge spicule spiculum1842 spicula1845 spicule1846 needle1870 1842 Penny Cycl. XXII. 376/1 The calcareous and silicious spicula, and the formation and distribution of the pores and orifices of sponges. 1865 P. H. Gosse Land & Sea 266 These spicula or needles..make up the firm portion of the Sponge. 1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 114 A multitude of separate spicula, composed of an animal substance..impregnated with carbonate of lime. attributive.1883 W. Saville-Kent Fisheries Bahamas 33 In a third group, that of the Calcispongiæ, a spicula skeleton is likewise developed. 4. = spicula n. 4. ΘΚΠ the world > life > the body > structural parts > bone or bones > parts of bones > [noun] > natural outgrowth or projecting part process1565 production1578 apophysis1611 processus1664 probole1684 spine1706 ramus1731 spinous process1732 plectrum1792 buttress1824 epicondyle1828 spiculum1873 1873 St. G. Mivart Lessons Elem. Anat. iii. 116 The malar bone..may be merely a delicate spiculum of bone. 1874 G. Lawson Dis. Eye (ed. 2) 68 To detect a fine spiculum of steel, or a fragment of glass,..which may have been impacted on the cornea. This entry has not yet been fully updated (first published 1914; most recently modified version published online September 2018). < n.1746
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