‖Ba‐sip′te‐ryg″i‐um (�), n. [NL., fr. Gr. βάσισ a base + πτερύγιον a fin.] (Anat.) A bar of cartilage at the base of the embryonic fins of some fishes. It develops into the metapterygium. — Ba‐sip′ter‐yg″i‐al (�), a.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.