- comarginal
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adj. [L. cum, with; margo, edge](MOLLUSCA: Bivalvia)Coinciding with the growth lines of the shell; concentric.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
comarginal
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concentric — adj. [L. cum, with; centrum, midpoint of a circle] Something having a common center, i.e., lines or ridges curving around a center; arcs having the same center; see comarginal … Dictionary of invertebrate zoology
