'Mesopterygial' definitions:

Definition of 'Mesopterygial'

From: GCIDE

Mesopterygium \Me*sop`te*ryg"i*um\, n. [NL., fr. Gr. me`sos middle + ? a fin.] (Anat.) The middle one of the three principal basal cartilages in the fins of fishes. -- {Me*sop`ter*yg"i*al}, a. [1913 Webster]