Propterygium

Prop`te`ryg´i`um

(Anat.) The anterior of three principal cartilages in the fins of some fishes.

propterygium

[‚präp·tə′rij·ē·əm] (vertebrate zoology) The anterior of the three principal basal cartilages forming a support of one of the paired fins of sharks, rays, and certain other fishes.

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