"Aptychus" is a word in ENGLISH
A shelly plate found in the terminal chambers of ammonite
shells. Some authors consider them to be jaws; others, opercula.
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One of a pair of shelly plates found in some cephalopods, as the ammonites.
Read the complete definitionA division of Amphineura in which the body is naked or covered with slender spines or setae, but is without …
Read the complete definitionThe shelly skeleton of a sea urchin.
Read the complete definitionA stomach armed with chitinous or shelly plates or teeth, as in certain insects and mollusks.
Read the complete definitionOf or pertaining to an oyster, or to a shell; shelly.
Read the complete definitionOne of a pair of shelly plates that protect the siphon tubes of certain bivalves, as the Teredo. See Illust. …
Read the complete definitionA shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the …
Read the complete definitionA division of gastropod Mollusca, including the chitons. The back is covered by eight shelly plates. Called also Polyplacophora. See …
Read the complete definitionpunga n operculum, a shelly plate attached to the foot of gastropod mollusks which covers the mouth part of the …
Read the complete definitionAbounding with shells; consisting of shells, or of a shell.
Read the complete definitionAny bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell.
Read the complete definitionShelly.
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