单词 | adelgid |
释义 | adelgidn.adj. Entomology. A. n. Any of various homopteran bugs constituting the family Adelgidae, closely related to aphids, which feed on the sap of coniferous trees, often form galls, and at certain stages of the life cycle are covered with a white, wool-like waxy secretion. ΚΠ 1928 P. N. Annand in Stanford Univ. Publ. Ser. Biol. Sci. 6 iv. 21 Larix, Pseudotsuga..or Abies being the intermediate host depending on the species of Adelgid involved. 1964 Q. Jrnl. Forestry 58 160 The silver fir adelgids can be identified by examining..the dorsal surfaces of individuals of the neosistentes stage. 2007 New Yorker 10 Dec. 67/1 These invasives often flourish in their new ecosystems because, like the woolly adelgid, they have escaped their predators. B. adj. (attributive). Of or relating to adelgids. ΚΠ 1937 B. H. Wilford Spruce Gall Aphid 30 Growth is not usually retarded by adelgid attack. 1971 Nature 2 July 13/2 This publication includes morphological keys and descriptions of fourteen morphs of the nine adelgid species having alatae in Britain. 1987 Reader's Digest Encycl. Garden Plants & Flowers (ed. 4) 746/1 Adelgid colonies are conspicuous during summer when they produce coverings of white waxy wool which may prevent chemical control. 2003 T. Silver Mount Mitchell & Black Mountains vi. 237 In Canada and New England, as in northern Europe, cold temperatures kept adelgid populations in check. This is a new entry (OED Third Edition, December 2011; most recently modified version published online December 2021). < n.adj.1928 |
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