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British Dictionary definitions for vocal sac

vocal sac

noun
  1. zoology either of the loose folds of skin on each side of the mouth in many male frogs that can be inflated and act as resonators
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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