| 单词 | radial sector |
| 释义 | > as lemmasradial sector radial sector n. Entomology the second principal division of the radius of an insect's wing (radius n. 1c), which typically has four branches. ΚΠ 1887 Amer. Naturalist 21 934 Redtenbacher defines five fields in the fully-developed wing of an insect. These are (1) the costal field, with the costa; (2) the radial field, with the radius and its numerous sectors; [etc.].] 1898 J. H. Comstock & J. G. Needham in Amer. Naturalist 32 87 The second of the principal divisions of radius is typically four-branched, and on account of the frequency of the necessity of making reference to it a special name has been applied to it, the radial sector. 1938 A. D. Imms Gen. Textbk. Entomol. (ed. 4) i. 39 The radius (R) is typically 5-branched..: the second branch or radial sector (Rs) is concave and divides into four veins (R2 to R5). 2001 Florida Entomologist 84 71/2 Sclerotized media of fore wing with several very faint diagonal anterior branches intersecting radial sector. < as lemmas |
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