What does utricle mean?
An utricle is a small sac or pouch-like structure. Its best-known meaning is anatomical: the utricle is one of the two small organs in the vestibular system of the inner ear, alongside the saccule. It contains sensory structures that respond to linear acceleration and the pull of gravity, helping the brain determine movement, head tilt, and orientation. A second specialized meaning refers to the prostatic utricle, a small recess in the prostatic urethra. In botany, the word can also describe a small, dry, indehiscent fruit, especially one produced by sedges. The word is consequently more common in medicine and biology than in general conversation, but it is useful because it names precise structures involved in balance and in reproductive anatomy. Its Latin origin reflects the original sense of a little bag or sac.
nounA small sac or pouch-like structure, especially the membranous sac in the vestibular part of the inner ear that helps detect linear acceleration and head orientation relative to gravity.
- The utricle is one of two small, fluid-filled sacs in the vestibular part of the inner ear; together with the saccule, it helps detect linear acceleration and head position relative to gravity.
- The prostatic utricle is a small midline recess in the prostatic urethra.
- In botany, an utricle is a small, dry, indehiscent fruit or seed-bearing structure, typical of sedges.
- In general anatomical usage, an utricle is any small sac or pouch-like cavity.
"The utricle sends information about linear acceleration and head position to the brain, helping maintain balance."
"Damage to the utricle can cause vertigo and difficulty maintaining balance."
"Each sedge fruit is a small utricle containing a single seed."
The plural is uncommon in general use but is standard when referring to multiple utricles or paired structures in different individuals.
"The researchers examined the utricles of several patients with balance disorders."
The utricle is a tiny inner-ear organ that helps your brain track acceleration and tells you which way is up.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does utricle come from?
Utricle comes from Latin utriculus, a diminutive of uter, meaning “womb,” used by extension for a small bag or sac. The anatomical sense developed through this image of a small pouch. English usage is related to words such as uterus, uterine, and intrauterine, which share the same Latin root.
Related word forms
How utricle is actually used
This is primarily a technical medical and botanical term. In discussions of the inner ear, it is usually used with anatomical modifiers such as "vestibular" or "the macula of the utricle."
Easily confused with utricle
The utricle and saccule are distinct sacs of the inner ear: the utricle responds mainly to horizontal linear acceleration, whereas the saccule responds especially to vertical linear acceleration.
A ventricle is typically a cavity or chamber, such as one of the heart's four chambers, whereas an utricle is a small sac-like structure.