英语词汇“operculum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

o·per·cu·lum

(ō-pûrkyə-ləm)

n. pl. o·per·cu·la (-lə) or o·per·cu·lums

Biology A lidlike structure covering an opening, especially:

a. A bony plate that covers and protects the gills of most bony fishes. Also called gill cover.

b. A horny or calcareous plate attached to the foot of most larval and many adult gastropods, used to close the aperture when the animal retracts into its shell.

c. A covering at the top of the spore capsule of most mosses, falling off when mature spores are released.

[Latin, lid, from operīre, to cover; see wer-⁴ in the Appendix of Indo-European roots.]

o·percu·lar (-lər) adj.

单词	operculum
释义	o·per·cu·lum (ō-pûrkyə-ləm) n. pl. o·per·cu·la (-lə) or o·per·cu·lums Biology A lidlike structure covering an opening, especially: a. A bony plate that covers and protects the gills of most bony fishes. Also called gill cover. b. A horny or calcareous plate attached to the foot of most larval and many adult gastropods, used to close the aperture when the animal retracts into its shell. c. A covering at the top of the spore capsule of most mosses, falling off when mature spores are released. [Latin, lid, from operīre, to cover; see wer-⁴ in the Appendix of Indo-European roots.] o·percu·lar (-lər) adj.
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