Definitions

1. noun

A small, usually oval or egg-shaped, membranous sac or pouch, especially one that contains air or fluid.

“The ficula of the Eustachian tube plays a crucial role in maintaining equal air pressure on both sides of the eardrum.”

2. noun

A small, oval or egg-shaped air sac in the middle ear.

“The ficula helps to equalize air pressure in the middle ear.”