|
|
Definition of Operculum
1. Noun. 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.
Definition of Operculum
1. n. The lid of a pitcherform leaf.
Definition of Operculum
1. Noun. A covering flap or lidlike structure in plants and animals, such as a gill cover ¹
¹ Source: wiktionary.com
Definition of Operculum
1. an opercule [n -LA or -LUMS] - See also: opercule
Medical Definition of Operculum
1. A lid or cover becoming detached at maturity by abscission, in Eucalyptus (for example), a cap covering the bud and formed by fusion or cohesion of perianth parts. (09 Oct 1997)
Lexicographical Neighbors of Operculum
Literary usage of Operculum
Below you will find example usage of this term as found in modern and/or classical literature:
1. Manual of the Mosses of North America by Leo Lesquereux, Thomas Potts James (1884)
"Plant, calyptra, capsule with operculum, and two 2-cleft and two teeth of the
... Plant, calyptra, capsule and operculum together with the pedicel and ..."
2. Journal of the Proceedings of the Linnean Society by Linnean Society of London (1857)
"4. Species fructu ignoto. 23. E. citriodora. operculum ... operculum acuminatum.
II. Folia alterna, latitudine vix aut paulo ..."
3. Animal Life as Affected by the Natural Conditions of Existence by Carl Semper (1881)
"Thus an operculum placed on the hinder surface of the foot, as in Neritina, would
be useless, since it cannot serve to close the opening and to protect the ..."
4. Botany by Geological Survey of California, William Henry Brewer, Sereno Watson, Asa Gray (1880)
"... brown, obovate-oblong, symmetrical, contracted below the mouth whe.n dry ;
operculum ... frequently incurved, constricted when dry ; operculum ..."
5. Annals and Magazine of Natural History by William Jardine (1869)
"On the Animal and operculum of ... differed so much in the characters of the
animal and operculum from the other forms classed in that genus by Pfeiffer and ..."
6. A Treatise on Zoology by Edwin Ray Lankester (1906)
"short, obtuse posteriorly ; shell thick with a short spire, the last whorl large
and the canal short; aperture wide ; columella flattened ; operculum horny. ..."
Other Resources:
