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SYN: utriculus [TA], sacculus communis.

- prostatic u. [TA] a minute pouch in the prostate that opens on the summit of the seminal colliculus, the analog of the uterus and vagina in the female, being the remains of the fused caudal ends of the paramesonephric ducts. SYN: utriculus prostaticus [TA], masculine uterus, Morgagni sinus (2), sinus pocularis, uterus masculinus, vagina masculina, vesica prostatica, Weber organ.

- u. of vestibular labyrinth [TA] the larger of the two membranous sacs in the vestibule of the labyrinth, lying in the elliptical recess; from it arise the semicircular ducts.

utri·cle 'yü-tri-kəl n a small anatomical pouch: as

a) the part of the membranous labyrinth of the ear into which the semicircular canals open called also utriculus

b) PROSTATIC UTRICLE

utric·u·lar yu̇-'trik-yə-lər adj

1. the larger of the two membranous sacs within the vestibule of the ear: it forms part of the membranous labyrinth. It is filled with fluid (endolymph) and contains a macula. This responds to gravity and relays information to the brain about the position of the head.

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