define.com: Internet Policy Discussion with Useful Examples

operculum

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Operculum \O*per"cu*lum\, noun; pl. L. {Opercula}, E. {Operculums}. [L., a cover or lid, fr. operire to cover.]

1. (Bot.) (a) The lid of a pitcherform leaf. (b) The lid of the urnlike capsule of mosses.

2. (Anat.) (a) Any lidlike or operculiform process or part; as, the opercula of a dental follicle. (b) The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid. (c) The principal opercular bone in the upper and posterior part of the gill cover.

3. (Zool.) (a) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of {Gastropoda}. (b) Any lid-shaped structure closing the aperture of a tube or shell.

From WordNet (r) 3.0 (2006) [wn]:

operculum

noun

1: a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted


The dictionary definitions are retrieved from a local copy of two of the open source DICT dictionaries. Click here for the database copyright information. DEFINE.COM is registered as an educational NONPROFIT corporation. We aim to please around here. We believe in using positive reinforcement to get things done. We make suggestions that are intended to make life more enjoyable. We think about efficiency, automation, security, privacy, social and ecological responsibility and positive humanitarian ethics and values. We are benevolent. DO NO HARM is our motto.

In the interest of FULL DISCLOSURE, there is a particularly interesting SCREENSHOT of the home page here.

I used Abduction! for Firefox or Webpage Screenshot for Chrome to get this series of SCREENSHOTS.

Electronic Frontier Foundation Golden Key Campaign

I don't want Uncle Sam having my SIM Card PRIVATE keys.

SIM Card
Golden Key

Sunday, March 1, 2015 10:59:38 AM Coordinated Universal Time (UTC)

DEFINE.COM_operculum_2015-03-01_10-59-38_54-91-42-7