WordReference Random House Unabridged Dictionary of American English © 2019
bi•pin•nar•i•a  (bī′pi nârē ə),USA pronunciation n., pl.  -nar•i•ae (-nârē ē′),USA pronunciation  -nar•i•as. 
  1. Invertebratesthe free-swimming, bilaterally symmetrical larva of certain starfishes.
  • Neo-Latin; see bi-1, pinna, -aria

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