operculum

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English[edit]

English Wikipedia has an article on:
Wikipedia
Illustration of a fish's opercular series, with the operculum (yellow), preoperculum (red), interoperculum (green) and suboperculum (pink).
Sea snail with its operculum covering the aperture.
The operculum of the brain.
Flower buds of Eucalyptus erythrocorys, with and without opercula.

Etymology[edit]

Borrowed from Latin operculum.

Noun[edit]

operculum (plural opercula)

  1. (zoology) A covering flap in animals, such as a gill cover.
    • 2017, Susannah Lydon, The Guardian, 18 January:
      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.
    • 1901, H. G. Wells, The First Men in the Moon, chapter IX, page 95
      I lifted the circular operculum from its place and laid it carefully on the bale.
  5. This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.

Related terms[edit]

Derived terms[edit]

Translations[edit]


Latin[edit]

Etymology[edit]

From operiō (I close) +‎ -culum.

Pronunciation[edit]

Noun[edit]

operculum n (genitive operculī); second declension

  1. cover, covering

Declension[edit]

Second-declension noun (neuter).

Case Singular Plural
Nominative operculum opercula
Genitive operculī operculōrum
Dative operculō operculīs
Accusative operculum opercula
Ablative operculō operculīs
Vocative operculum opercula

Descendants[edit]

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

References[edit]