单词 | tunicate |
释义 | tunicateadj.n. A. adj. Having or enclosed in a tunic or covering; spec. Botany having or consisting of a series of concentric layers, as a bulb; Entomology sheathed in or issuing from one another, as the joints of antennæ; Zoology having a tunic or mantle; belonging to the Tunicata. ΘΚΠ the world > plants > part of plant > bulb > [adjective] > having concentric layers tunicated1744 tunicate1760 the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [adjective] > of head > having antennae > of joints of: issuing form one another tunicate1826 the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > division Molluscoidea > [adjective] > of or belonging to Tunicata tunicated1840 tunicate1847 urochordate1877 1760 J. Lee Introd. Bot. iii. ix. 191 A tunicate Bulb, when it consists of many Tunics or Coats. 1824 J. C. Loudon Green-house Compan. i. 237 Tunicate bulbs..may be increased by cutting off the upper part of the bulb horizontally. 1826 W. Kirby & W. Spence Introd. Entomol. IV. xlvi. 323 Tunicate Knob (Capitulum tunicatum). When the laminæ, at least on one side, appear to inosculate or to be imbedded in each other. 1847 Nat. Encycl. I. 752 It embraces..the conchiferous and tunicate mollusks. 1875 Zoologist 10 4313 Sponges, Anemones, and Tunicate Mollusca. B. n. One of a class of marine animals, formerly regarded as molluscs, but now classified as a degenerate branch of Chordata, comprising the ascidians and allied forms, characterized by a pouch-like body enclosed in a tough leathery integument, with a single or double aperture through which the water enters and leaves the pharynx. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > division Molluscoidea > [noun] > division Tunicata > member of tunicary1835 tunicate1848 urochord1885 urochordate1895 1848 B. H. Smart Walker's Pronouncing Dict. Suppl. Tunicates, or Tunicaries, an order of acephalous mollusks having a soft outer covering or mantle; otherwise called Ascidians. 1863 E. V. Neale Analogy Thought & Nature 177 The Tunicates, a class of creatures with a fleshy centre and tough leathery skin. 1877 T. H. Huxley Man. Anat. Invertebrated Animals x. 600 All the fixed Tunicates present two, more or less closely approximated, apertures. 1889 P. Geddes & J. A. Thomson Evol. Sex v. §2 Among the sea-squirts or tunicates, the reproductive organs are frequently ductless. This entry has not yet been fully updated (first published 1915; most recently modified version published online March 2020). † tunicatev. Obsolete. rare. Apparently only attested in dictionaries or glossaries. ΚΠ 1623 H. Cockeram Eng. Dict. Tunicate, to cloake or hide a thing. This entry has not yet been fully updated (first published 1915; most recently modified version published online June 2021). < adj.n.1760v.1623 |
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