utricle (utriculus) (yoo-trik-ŭl) n.
1. the larger of the two membranous sacs within the vestibule of the ear. It contains a macula, which responds to gravity and relays information to the brain about the position of the head.

2. a small sac (the prostatic u.) extending out of the urethra of the male into the substance of the prostate gland.

utricle small sac or bladder. XVIII. — F. utricle or L. ūtriculus, dim. of ūter leather bottle; see -CLE.