- prosocline
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adj. [Gr. proso, forward; klinein, to slant]1. (MOLLUSCA: Bivalvia)2. (MOLLUSCA: Gastropoda)Usually referring to growth lines leaning forward (adapically) with respect to the direction of the helicocone.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.