operculum


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o·per·cu·lum

 (ō-pûr′kyə-ləm)
n. pl. o·per·cu·la (-lə) or o·per·cu·lums
Biology A lidlike structure covering an opening, especially:
a. A bony plate that covers and protects the gills of most bony fishes. Also called gill cover.
b. A horny or calcareous plate attached to the foot of most larval and many adult gastropods, used to close the aperture when the animal retracts into its shell.
c. A covering at the top of the spore capsule of most mosses, falling off when mature spores are released.

[Latin, lid, from operīre, to cover; see wer- in Indo-European roots.]

o·per′cu·lar (-lər) adj.

operculum

(əʊˈpɜːkjʊləm) or

opercule

n, pl -la (-lə) or -lums
1. (Zoology) zoology
a. the hard bony flap covering the gill slits in fishes
b. the bony plate in certain gastropods covering the opening of the shell when the body is withdrawn
2. (Botany) botany the covering of the spore-bearing capsule of a moss
3. (Biology) biology any other covering or lid in various organisms
[C18: via New Latin from Latin: lid, from operīre to cover]
oˈpercular, operculate, operculated adj

o•per•cu•lum

(oʊˈpɜr kyə ləm)

n., pl. -la (-lə), -lums.
1. a part or organ serving as a lid or cover, as a covering flap on a seed vessel.
2. the gill cover of fishes and amphibians.
[1705–15; < New Latin, Latin: lid, cover]
o•per′cu•lar, adj.

o·per·cu·lum

(ō-pûr′kyə-ləm)
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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.operculum - 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 retractedoperculum - 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
plate - any flat platelike body structure or part
Translations
kiduskansi

operculum

[əʊˈpɜːkjʊləm] nopercolo

o·per·cu·lum

n. opérculo.
1. cubierta o tapadera;
2. una de las partes del cerebro que cubre la ínsula.
References in classic literature ?
As this species has a thick calcareous operculum, I removed it, and when it had formed a new membranous one, I immersed it for fourteen days in sea-water, and it recovered and crawled away: but more experiments are wanted on this head.
6] The large claws or pincers of some of these crabs are most beautifully adapted, when drawn back, to form an operculum to the shell, nearly as perfect as the proper one originally belonging to the molluscous animal.
We found that compared to chronic depression patients with moderate-to-severe psychotic symptoms, GMV was significantly decreased in the left operculum cortex in chronic schizophrenia patients with moderate-to-severe depressive symptoms.
Contract notice: supply of aerial columns and access control bins for the collection of omrs, and aerial operculum columns for the collection of rec - 2018
Cyptocephala alvarengai eggs are barrel-shaped, circular, with a convex operculum, arranged in double rows with grayish brown coloration.
Other cargo and artifacts found with the wreck were raw ivory and hippo teeth, African Blackwood logs, traces of spices and oils, Cypriot and Syrian pottery, operculum shells, used to make incense, jewelry, ostrich eggs and 24 anchor stones.
Animals were considered relaxed when they did not show any resistance to the pulling of the operculum with the aid of a forceps.
As an additional line of defense, and in contrast with sabellids, most serpulids modify a single radiole into a peduncle topped by an enlarged operculum, a plug with a chitinous or calcareous endplate, that stoppers the tube opening when withdrawn.
1c-e) elongate, conical, tapering distally, about as long as two previous somites combined; with crescentic anal operculum not reaching posterior margin of somite (Fig.
gariepinus were exposed to varying concentrations of aluminium phosphide and this manifested various effects on the behaviour of the fish which included graying of the epidermal layer of the skin, yellowish colouration of the operculum, fin and opercula movement and eventually death.
The ventral body structures and hooks of the antennae in the family Bomolochidae are adapted so as to allow the parasite to become attached to the host on the gills, internal wall of the operculum, fins and integument, and around the eyes (Radhakrishnan & Nair, 1983, Boxshall, 2005).
During the infra-insular phase a temporal lobotomy is performed (resection of the temporal operculum, transection of the temporal stem, uncus, and removal of the amygdala and the anterior hippocampus) (8,59).