baleen (n.) Look up baleen at Dictionary.com
early 14c., "whalebone," from Old French balaine "whale, whalebone" (12c.), from Latin ballaena, from Greek phallaina "whale" (apparently phallos "swollen penis," perhaps because of a whale's body shape, with a fem. suffix), possibly from PIE root *bhel- (2) "to blow, inflate, swell" (see bole). The b- (instead of -p-) for ph- substitution shows it entered Latin through a third language (Klein suggests Illyrian).