Basipterygium

Ba·sip`te·ryg'i·um noun [ New Latin , from Greek ba`sis a base + ptery`gion 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 adjective
Found on http://www.encyclo.co.uk/webster/B/19

Basipterygium

• (n.) A bar of cartilage at the base of the embryonic fins of some fishes. It develops into the metapterygium.
Found on http://thinkexist.com/dictionary/meaning/basipterygium/
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