operculum

English

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operculum

Wikipedia

Etymology

Borrowed from Latin operculum.

Pronunciation

• (UK) IPA^(key): /əʊˈpɜː.kjʊ.ləm/
• (US) IPA^(key): /oʊˈpɝ.kjə.ləm/

• Audio (US):

  (file)

Noun

operculum (plural opercula)

1. (zoology) A covering flap in animals, such as a gill cover.
   • 2017 January 18, Susannah Lydon, The Guardian‎:

     Hyoliths […] have a small, conical calcium carbonate shell, with a lid called an operculum.

2. (botany) The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds.
3. (dentistry) A gum flap covering (part of) a partially erupted tooth, usually a wisdom tooth.
4. A structure which serves as a cover or lid.
   • 1900 December – 1901 August, H[erbert] G[eorge] Wells, chapter IX, in The First Men in the Moon, London: George Newnes, […], published 1901, →OCLC, page 95:

     I lifted the circular operculum from its place and laid it carefully on the bale.

5. (anatomy) One of several flaps of cerebral cortex covering the insula. (clarification of this definition is needed.)

Derived terms

• operculiferous
• operculitis
• preoperculum
• interoperculum
• suboperculum

Related terms

• opercle

Translations

(zoology) covering flap in animals

Aleut: hmuqatix̂ Catalan: opercle (ca) m Chinese: Mandarin: 厴 / 厣 (zh) (yǎn) Czech: skřele, žaberní víčko Finnish: kiduskansi (fi) (in fish) French: opercule (fr) m Irish: lannach m, clúidín m Italian: opercolo (it) m Manx: bleayst f Maori: kōrama (in shellfish), kata (of shellfish) Persian: درپوش (fa) (darpuš) Portuguese: opérculo (pt) m Russian: оболо́чка (ru) f (obolóčka), покры́шка (ru) f (pokrýška), жа́берная кры́шка f (žábernaja krýška) (gill cover) Spanish: opérculo (es) m Tagalog: unya

(botany) lidlike portion on a sporangium or fruit that detaches

Persian: درپوش (fa) (darpuš)

structure which serves as a cover or lid

Latin

Etymology

From operiō (“to close”) +‎ -culum.

Pronunciation

• (Classical Latin) IPA^(key): [ɔˈpɛr.kʊ.ɫũː]
• (modern Italianate Ecclesiastical) IPA^(key): [oˈpɛr.ku.lum]

Noun

operculum n (genitive operculī); second declension

1. cover, covering

Declension

Second-declension noun (neuter).

	singular	plural
nominative	operculum	opercula
genitive	operculī	operculōrum
dative	operculō	operculīs
accusative	operculum	opercula
ablative	operculō	operculīs
vocative	operculum	opercula

Descendants

• → English: opercle, operculum
• → French: opercule
• → Italian: opercolo
• → Portuguese: opérculo
• → Spanish: opérculo

References

• “operculum”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “operculum”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• “operculum”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• “operculum”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers