单词 | rhabdite |
释义 | rhabditen. 1. Mineralogy. A form of schreibersite occurring as small typically rod-shaped crystals. ΘΚΠ the world > the earth > minerals > types of mineral > phosphides > [noun] schreibersite1849 rhabdite1865 1865 Q. Jrnl. Sci. 2 117 A new mineral, discovered in a crystal by M. Rose, in a meteoric iron, was described, to which the name of rhabdite was given. 1939 Philos. Trans. (Royal Soc.) A. 238 394 Observations of the orientations of kamacite crystals..by means of the small rhabdite rods which they contained. 1972 R. Galopin & N. F. M. Henry Microsc. Study Opaque Minerals 233/2 Kamacite... White in colour, but if finely intergrown with Rhabdite it appears faintly brownish. 2000 Quaternary Internat. 68–71 244/1 Schreibersite..occurs throughout the whole meteorite, mostly in the form of rhabdite. 2. Entomology. Each of the blade-like components forming the ovipositor or sting in various insects. Now rare. ΘΚΠ the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [noun] > abdomen > ovipositor > organ forming rhabdite1866 1866 Proc. Boston Soc. Nat. Hist. 10 281 The three pairs of rhabdites approach each other so closely that the two outer ones completely ensheath the inner, until a complete distensible tube is formed. 1898 A. S. Packard Text-bk. Entomol. 168 Two pieces forming the outer pair of rhabdites. 1906 J. B. Smith Explan. Terms Entomol. 117 Rhabdites, the blade-like elements of the sting and ovipositor. 3. Zoology. Any of the small rodlike structures which are secreted by the epidermis in turbellarians and certain other worms and dissolve to form a layer of mucus; esp. (in turbellarians) a rhabdoid having a lamellate structure. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Platyhelminthes > [noun] > class Turbellaria > member of > rod-like body found in integument rhabdite1883 rhabdoid1908 1883 Nature 4 Jan. 228/1 He [sc. L. von Graff] considers the rhabdites or rod-bodies homologous with nematocysts. 1925 Trans. Amer. Microsc. Soc. 44 56 Planarians catch arthropods by exuding rhabdites from the dorsal surface to form a slime which entangles the feet of the prey. 1978 Zoomorphologie 91 235 Rhabdites are rod-shaped secretory products characteristic of the Turbellaria but also found in nemerteans, gastrotrichs and annelids. 1995 C. Nielsen Animal Evol. xxvi. 221 Lamellate rhabdites are only found in the ‘higher’ turbellarians. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1865 |
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