conch

(redirected from conchs)
Also found in: Dictionary, Thesaurus, Medical.
Related to conchs: Queen conch

conch

(kŏngk, kŏnch, kôngk), common name for certain marine gastropodgastropod,
member of the class Gastropoda, the largest and most successful class of mollusks (phylum Mollusca), containing over 35,000 living species and 15,000 fossil forms.
..... Click the link for more information.
 mollusks having a heavy, spiral shell, the whorls of which overlap each other. In conchs the characteristic gastropod foot is reduced in size and the operculum, a horny plate located on the foot and used to seal the shell opening in many gastropods, has the appearance and function of a claw. During locomotion, the operculum secures a foothold in the sand, and the conch jumps forward by means of the quick contraction of a retractor muscle called the columella muscle. Thus the conch lacks the creeping motion of most gastropods. The king conch, Strombus gigas, found in the warmer waters of the Atlantic, Caribbean, and Gulf of Mexico, has a shell 10 to 12 in. (25–30 cm) long and may weigh up to 5 lb (2.3 kg). Similar in size and distribution is the queen conch, Cassis cameo. Its shell has been used in Europe to carve cameos. Conch shells range in color from white to red; they have been used by humans to fashion a number of items, such as buttons, ornaments, or the crude trumpets made from the shell of the trumpet conch, Charonia tritonis. This conch is similar in shape to the king and queen conchs but is much more slender and reaches a length of 20 in. (50 cm). C. tritonis is found in the Gulf of Mexico and the Indian Ocean. The largest conch and also one of the largest univalves in the world is the horse conch, Pleuroploca gigantea, having a shell length of 24 in. (60 cm). It is found along the Atlantic Coast from North Carolina to Brazil. The body can retreat entirely into the shell and remain there for months if unfavorable conditions prevail. An unusual conch shell is that of the spider conch, Lambis lambis, which has leglike projections. Spider conchs are voracious carnivores, common on coral reefs. They also feed on algae, as do the king conchs. Most conchs are carnivorous, feeding on bivalve mollusks; some are scavengers as well. They inhabit tropical waters and have been used as a food source for man. The conch is classified in the phylum MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
..... Click the link for more information.
, class Gastropoda, order Mesogastropoda.

Conch

Semidome vaulting of an apse or eastern end of a church.

conch

[käŋk]
(invertebrate zoology)
The common name for several species of large, colorful gastropod mollusks of the family Strombidae; the shell is used to make cameos and porcelain.

conch

The domed roof of a semicircular apse.

conch

1. any of various tropical marine gastropod molluscs of the genus Strombus and related genera, esp S. gigas (giant conch), characterized by a large brightly coloured spiral shell
2. the shell of such a mollusc, used as a trumpet
References in periodicals archive ?
Furthermore, both the bathymetry of San Andres archipelago (Andrade, 2001) that limit the queen conch dispersion among sites, as well as the environmental and fishing variable conditions, may induce phenotypic differences in the queen conch shells.
Shell erosion in conchs start already when the conch is alive and is affected by the type of stratum the conch occupies (Medley 2008).
Caption: Among jumping snails, hunchbacked conchs are some of the most vigorous.
The new development is said to have included a resumption of conch farming and an enlargement that was to have included "fin fish" production.
In the land of cutoff jeans, wide smiles, and deep tans better known as the Florida Keys, fishermen with lazy eyes belly up to thatchroofed bars with their conch fritters and ice-cold beers.
0 was used to calculate conch population densities in each station, and to estimate the overall number of conchs in each zone.
Horse conchs were the rarest of the snails encountered during the visual surveys, although they were observed in all 4 y and at all 10 sites.
No minimum length is set for queen conchs, except where it is 22 cm for those to be exported.
In despite that statistical analysis showed no significantly differences in density among zones, the adult density at Laguna represented up to 52% of the total density of the study area indicating that these conchs have a preference for that zone.
We used a chi-square ([chi square]) test based on permutations implemented in Microsoft Visual Basic[R] (2005) (PER test) to compare the frequency of conchs per substrate and the proportion of substrates in Coiba Archipelago, but not in Las Perlas due to small sample size.
Abundance and distribution of queen conch (Strombus gigas, Linne 1758) veligers of Alacranes Reef, Yucatan, Mexico.
Queen conchs were sampled at San Andres island (Colombia) in the southern Caribbean sea for histological study of the reproductive cycle.