Meaning of branchial pouch

bran'chial pouch'

Pronunciation: [key]
— Embryol. Embryol.
  1. one of a series of rudimentary outcroppings of the inner pharyngeal wall, corresponding to the branchial grooves on the surface. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.