请输入您要查询的英文单词:

 

单词 operculum
释义 oper·cu·lum
\ōˈpərkyələm\ noun
(plural opercu·la \-lə\ ; also oper·culums)
Etymology: New Latin, from Latin, cover, lid, from operire to cover, shut (from op-, ob to, before + — assumed — verire to shut) + -culum, suffix denoting instrument — more at epi-, weir
1. : a lid or covering flap (as of a moss capsule, of an ascus, of a pyxidium in a seed plant, or of the pitcher in some pitcher plants)
2. : a part of the cerebrum bordering the lateral fissure and concealing the island of Reil
3. : a body process or part that suggests a lid: as
 a. : the horny or shelly plate that develops on the posterior dorsal surface of the foot in many gastropod mollusks (as in Streptoneura) and serves to close the shell when the animal is retracted
 b. : the two or more movable plates of the shell of a barnacle
 c. : the first pair of abdominal appendages of a king crab which are united and cover the other pairs
 d. : one of the small plates covering the orifice of a trachea or lung sac in a spider
 e. : the fold of integument usually supported by bony plates that protects the gills in most fishes and some amphibians : gill cover — see fish illustration
 f. : the principal bony plate of the gill cover : opercle
 g. : a flap that covers the mouth of some bryozoans
 h. : a circular lid at one end of the egg of various invertebrates
随便看

 

英语词典包含332784条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/11/11 19:14:29