What does cauda mean?
Cauda is the Latin word for 'tail', adopted into English as a technical term in anatomy and zoology to denote a tail or any tail-like posterior structure. Its best-known use is in the phrase cauda equina, literally 'horse's tail', which describes the bundle of spinal nerve roots that hangs below the end of the spinal cord. The term also appears in older musicology, where it names a long final note or melismatic closing passage in medieval polyphony. Because it is a scholarly borrowing rather than a vernacular word, cauda carries a formal, scientific register: one encounters it in medical reports, anatomical descriptions, and academic texts far more often than in conversation. It forms the root of related English words such as caudal ('relating to the tail') and caudate ('having a tail'), and its influence reaches even further through coda, the Italian diminutive meaning a musical 'tail'.
A tail or tail-like posterior part of an organism or anatomical structure.
"The lizard's long cauda aids its balance as it moves along branches."
Used mainly in technical anatomical contexts; plural is caudae.
In medieval music, a prolonged final note or ornamental concluding passage.
"The chant closes with an elaborate cauda on the final syllable."
The Latin plural caudae is standard in technical writing, though the anglicized 'caudas' occasionally appears informally.
"Both specimens show elongated caudae characteristic of the species."
Your spinal cord's lowest nerves are literally named after a horse's tail — cauda equina means exactly that in Latin.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cauda
Cauda comes directly from Latin cauda, meaning 'tail' or 'the hinder part of an animal'. English borrowed it as a technical term, chiefly through anatomical and scientific Latin, so it retains its Latin form unchanged. The same root produced the adjective caudal and the biological term caudate, while Italian coda, a diminutive of cauda, entered English separately as a musical and literary term for a concluding section.
Related word forms
How cauda is actually used
Cauda is a learned, technical term found almost exclusively in medical, zoological, and historical musicological writing; it is rare in everyday speech. It is most familiar to general readers through the fixed phrase 'cauda equina'.
Easily confused with cauda
A coda is a concluding passage of music or text (from Italian for 'tail'), while cauda is the Latin anatomical term for an actual tail-like structure.