operculum

[ oh-pur-kyuh-luhm ]

/ oʊˈpɜr kyə ləm /

noun, plural o·per·cu·la [oh-pur-kyuh-luh], /oʊˈpɜr kyə lə/, o·per·cu·lums.

Botany, Zoology. a part or organ serving as a lid or cover, as a covering flap on a seed vessel.

Zoology.

the gill cover of fishes and amphibians.
(in many gastropods) a horny plate that closes the opening of the shell when the animal is retracted.

Origin of operculum

1705–15; <New Latin, Latin: lid, cover, equivalent to oper(īre) to cover + -culum-cule²

OTHER WORDS FROM operculum

o·per·cu·lar, adjective

Words nearby operculum

operatory, opera window, opercle, operculate, operculitis, operculum, opere citato, operetta, operon, operose, opgefok

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for operculum

Clitia is known from Creusia, by the articulations of the valves, and by the operculum, which in Creusia consists of four valves.
A Conchological Manual|George Brettingham Sowerby
Behind the hyomandibular there is a large bony plate, the operculum, formed of four large membrane bones.
The Vertebrate Skeleton|Sidney H. Reynolds
Shell fusiform and solid, aperture elongated, columella folded; no operculum; eyes on sides of tentacles.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5|Various
The operculum is calcareous, with eccentric, deeply cut grooves.
The Sea-beach at Ebb-tide|Augusta Foote Arnold

The shell consists of six plates, with an operculum of four valves.
The New Gresham Encyclopedia. Vol. 1 Part 3|Various

British Dictionary definitions for operculum

operculum

/ (əʊˈpɜːkjʊləm) /

noun plural -la (-lə) or -lums

zoology

the hard bony flap covering the gill slits in fishes
the bony plate in certain gastropods covering the opening of the shell when the body is withdrawn

botany the covering of the spore-bearing capsule of a moss

biology any other covering or lid in various organisms

Derived forms of operculum

opercular or operculate (əʊˈpɜːkjʊlɪt, -ˌleɪt), adjective

Word Origin for operculum

C18: via New Latin from Latin: lid, from operīre to cover

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for operculum

operculum

[ ō-pûr′kyə-ləm ]

n. pl. o•per•cu•lums

Something resembling a lid or cover.

The portions of the frontal, parietal, and temporal lobes covering the insula.

The mucus sealing the endocervical canal of the uterus after conception.

The attached flap in cases of torn retinal detachment.

The mucosal flap partially or completely covering an unerupted tooth.

Other words from operculum

o•per′cu•lar (-lər) adj.

Scientific definitions for operculum

operculum

[ ō-pûr′kyə-ləm ]

Plural opercula operculums

A lid or flap covering an opening, such as the gill cover in some fish or the horny flap covering the opening of a snail.

单词	operculum
释义	operculum [ oh-pur-kyuh-luhm ] / oʊˈpɜr kyə ləm / noun, plural o·per·cu·la [oh-pur-kyuh-luh], /oʊˈpɜr kyə lə/, o·per·cu·lums. Botany, Zoology. a part or organ serving as a lid or cover, as a covering flap on a seed vessel. Zoology. the gill cover of fishes and amphibians. (in many gastropods) a horny plate that closes the opening of the shell when the animal is retracted. Origin of operculum 1705–15; <New Latin, Latin: lid, cover, equivalent to oper(īre) to cover + -culum-cule² OTHER WORDS FROM operculum o·per·cu·lar, adjective Words nearby operculum operatory, opera window, opercle, operculate, operculitis, operculum, opere citato, operetta, operon, operose, opgefok Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for operculum Clitia is known from Creusia, by the articulations of the valves, and by the operculum, which in Creusia consists of four valves. A Conchological Manual\|George Brettingham Sowerby Behind the hyomandibular there is a large bony plate, the operculum, formed of four large membrane bones. The Vertebrate Skeleton\|Sidney H. Reynolds Shell fusiform and solid, aperture elongated, columella folded; no operculum; eyes on sides of tentacles. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5\|Various The operculum is calcareous, with eccentric, deeply cut grooves. The Sea-beach at Ebb-tide\|Augusta Foote Arnold The shell consists of six plates, with an operculum of four valves. The New Gresham Encyclopedia. Vol. 1 Part 3\|Various British Dictionary definitions for operculum operculum / (əʊˈpɜːkjʊləm) / noun plural -la (-lə) or -lums zoology the hard bony flap covering the gill slits in fishes the bony plate in certain gastropods covering the opening of the shell when the body is withdrawn botany the covering of the spore-bearing capsule of a moss biology any other covering or lid in various organisms Derived forms of operculum opercular or operculate (əʊˈpɜːkjʊlɪt, -ˌleɪt), adjective Word Origin for operculum C18: via New Latin from Latin: lid, from operīre to cover Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for operculum operculum [ ō-pûr′kyə-ləm ] n. pl. o•per•cu•lums Something resembling a lid or cover. The portions of the frontal, parietal, and temporal lobes covering the insula. The mucus sealing the endocervical canal of the uterus after conception. The attached flap in cases of torn retinal detachment. The mucosal flap partially or completely covering an unerupted tooth. Other words from operculum o•per′cu•lar (-lər) adj. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for operculum operculum [ ō-pûr′kyə-ləm ] Plural opercula operculums A lid or flap covering an opening, such as the gill cover in some fish or the horny flap covering the opening of a snail. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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