The Collaborative International Dictionary
Propterygia
Propterygium \Prop`te*ryg"i*um\, n.; pl. Propterygia. [NL., fr. Gr. ? before + ? a fin.] (Anat.) The anterior of three principal cartilages in the fins of some fishes. -- Prop`ter*yg"i*al, a.
Wiktionary
propterygia
n. (plural of propterygium English)