operculum

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English[edit]

Etymology[edit]

Borrowed from Latin operculum.

Noun[edit]

operculum (plural opercula)

  1. (zoology) A covering flap in animals, such as a gill cover.
  2. (botany) The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds.
  3. 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.

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Latin[edit]

Etymology[edit]

From operiō (I close) +‎ -culum.

Pronunciation[edit]

Noun[edit]

operculum n (genitive operculī); second declension

  1. cover, covering

Inflection[edit]

Second declension.

Case Singular Plural
nominative operculum opercula
genitive operculī operculōrum
dative operculō operculīs
accusative operculum opercula
ablative operculō operculīs
vocative operculum opercula

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