What does cochleae mean?
Cochleae is the plural of cochlea, denoting the pair of spiral-shaped, fluid-filled structures deep in the inner ear that make hearing possible. Shaped like a snail's shell — a resemblance captured in its name, which comes from the Latin word for snail — each cochlea houses thousands of tiny hair cells that translate sound vibrations into electrical signals sent to the brain. Because humans have one cochlea in each ear, writers discussing anatomy typically use the plural form, especially in medical, audiological, or scientific contexts. The term is formal and technical rather than conversational; in general speech, people more often say "inner ear." Damage to the cochleae — whether from loud noise, infection, aging, or certain medications — causes sensorineural hearing loss, which is why the word appears frequently in discussions of hearing health, deafness research, and treatments such as cochlear implants. Its striking spiral form has made it an enduring emblem of auditory science.
nounCochleae is the plural of cochlea: either of a pair of spiral-shaped, fluid-filled cavities in the inner ear that convert sound vibrations into nerve impulses.
- Anatomy: the paired spiral cavities of the inner ear responsible for hearing (plural form)
"The audiologist explained that damage to the delicate hair cells within the cochleae can lead to permanent hearing loss."
"Prolonged exposure to loud noise can irreversibly damage the sensitive structures inside the cochleae."
"Under the microscope, the sectioned cochleae revealed the elegant spiral architecture of the organ of Corti."
This is the Latin plural of cochlea. An anglicized plural, "cochleas," is also widely accepted, particularly outside formal academic writing.
"Both cochleae were examined before the fitting of hearing aids."
Named after a snail shell by ancient anatomists, the human cochlea coils about two and a half turns into a structure small enough to sit on your fingertip — and it is what lets you hear anything at all.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cochleae
Cochleae derives from Latin cochlea, meaning "snail" or "snail's shell," a name early anatomists gave to the organ because of its unmistakable coiled shape. The Latin term was adopted into anatomical usage in European medicine during the Renaissance, when Latin remained the language of scholarly description. The root also yields related English forms such as "cochlear" and "cochleate," all preserving the image of a spiral shell.
Related word forms
How cochleae is actually used
Strictly an anatomical and medical term; almost always encountered in formal, clinical, or scientific writing. In everyday English, the anglicized plural "cochleas" is increasingly common, while "cochleae" preserves the Latin plural and is favored in academic contexts. The word is nearly always used in the plural when discussing humans, since hearing depends on two cochleae working together.
Easily confused with cochleae
"Cochlea" is the singular form referring to one spiral organ of hearing, while "cochleae" refers to two or more such organs, typically one in each ear.