单词 | scutellum |
释义 | scutellumn. 1. Botany. a. (See quots.) ΘΚΠ the world > plants > particular plants > lichen > [noun] > part(s) of pelt1759 pelta1760 scutellum1760 scyphus1777 shield1796 podetium1814 apothecium1830 cistella1832 rhizine1832 scypha1832 soredium1836 amphigastria1842 gonidium1845 macrogonidium1853 hypothallus1855 crustaceous lichens1856 pycnide1856 perianth1857 isidium1866 thamnium1866 endospore1875 perigynium1882 pseudocyphella1882 thecium1882 parathecium1921 soralium1921 1760 J. Lee Introd. Bot. iii. xxii. 222 Scutellum, a small Buckler, which is a concave orbiculate Fructification, the Margin of which is elevated on every Side. 1793 T. Martyn Lang. Bot. sig. R3v Scutellum, an orbicular concave fructification (in some Lichens). 1866 in J. Lindley & T. Moore Treasury Bot. b. An anterior cotyledon in certain grasses. ΘΚΠ the world > plants > particular plants > plants and herbs > a grass or grasses > [noun] > part of bladec1450 grass root1474 bent1577 chat1601 grasstop1659 knee1678 locusta1707 straw1776 spikelet1793 strap1793 sheath-scale1796 spiket1796 stragule1821 scutellum1832 scobina1839 rachilla1842 chaff-scale1856 coleorhiza1866 hypoblast1882 lemma1906 1832 J. Lindley Introd. Bot. i. ii. 191 In wheat there is a second small cotyledon on the outside of the embryo, inserted a little lower down than the scutelliform cotyledon. This last is called scutellum by Gærtner, who considered it of the nature of vitellus. 1880 C. E. Bessey Bot. 451 The first leaf of the young plant (the cotyledon or scutellum). 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 620 In Grasses, however, the whole of the plumule projects from the seed, the scutellum only remaining behind in it. c. (See quot. 1900.) ΚΠ 1900 B. D. Jackson Gloss. Bot. Terms Scutellum..the conical cap of the endosperm in Cycadeae. 2. Zoology. a. Entomology. The third of the four sclerites composing any segment of the tergum of an insect; usually, the mesoscutellum. ΘΚΠ the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [noun] > thorax > scutellum scutel1804 scutellum1819 1819 G. Samouelle Entomologist's Compend. 266 Two stripes near the scutellum. 1896 tr. Boas' Zool. 259 A triangular median portion of the mesothorax (scutellum) remains uncovered. b. Ornithology. One of the horny plates which cover the feet of certain birds. ΘΚΠ the world > animals > birds > parts of or bird defined by > [noun] > feet > plate on or scutellum scutellum1840 scutella1859 1840 W. MacGillivray Man. Brit. Ornithol. I. 64 Toes short, feathered, all with two scutella at the end. 1884 E. Coues Key to N. Amer. Birds (ed. 2) iii. 249 Mimus...Tarsal scutella always distinct. This entry has not yet been fully updated (first published 1911; most recently modified version published online March 2022). < n.1760 |
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