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Discoid :: Discoid (a.) Having the form of a disk, as those univalve shells which have the whorls in one plane, so as to form a disk, as the pearly nautilus..

Goroon Shell :: Goroon shell () A large, handsome, marine, univalve shell (Triton femorale)..

Spindle :: Spindle (n.) Any marine univalve shell of the genus Rostellaria; -- called also spindle stromb.

Carnival :: Carnival (n.) A festival celebrated with merriment and revelry in Roman Gatholic countries during the week before Lent, esp. at Rome and Naples, during a few days (three to ten) before Lent, ending with Shrove Tuesday..

Formyl :: Formyl (n.) A univalent radical, H.C:O, regarded as the essential residue of formic acid and aldehyde..

Monovalent :: Monovalent (a.) Having a valence of one; univalent. See Univalent.

Sea Trumpet :: Sea trumpet () Any large marine univalve shell of the genus Triton. See Triton.

Pearl :: Pearl (n.) A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Pearls which are round, or nearly round, and of fine luster, are highly esteemed

Cingulum :: Cingulum (n.) A distinct girdle or band of color; a raised spiral line as seen on certain univalve shells.

Concho-spiral :: Concho-spiral (n.) A kind of spiral curve found in certain univalve shells.

Fig-shell :: Fig-shell (n.) A marine univalve shell of the genus Pyrula, or Ficula, resembling a fig in form..

Helicoid :: Helicoid (a.) Spiral; curved, like the spire of a univalve shell..

Holostomatous :: Holostomatous (a.) Having an entire aperture; -- said of many univalve shells.

Univalvular :: Univalvular (a.) Same as Univalve, a..

Bubble Shell :: Bubble shell () A marine univalve shell of the genus Bulla and allied genera, belonging to the Tectibranchiata..

Varix :: Varix (n.) One of the prominent ridges or ribs extending across each of the whorls of certain univalve shells.

Cymbium :: Cymbium (n.) A genus of marine univalve shells; the gondola.

Univalved :: Univalved (a.) Having one valve; as, a univalve shell or pericarp..

Univalve :: Univalve (a.) Alt. of Univalve.

Bellerophon :: Bellerophon (n.) A genus of fossil univalve shells, believed to belong to the Heteropoda, peculiar to the Paleozoic age..

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