What does clavus mean?
Clavus is the formal medical name for what most people call a corn: a small, hard, cone-shaped patch of thickened skin that forms on the toes or soles after repeated pressure or friction, typically from tight footwear. Its dense central core presses into the deeper tissue as you walk, producing sharp, localized pain — an apt sensation for a word derived from the Latin for 'nail'. Podiatrists treat a clavus by trimming away the hardened skin and addressing its cause, usually through better-fitting shoes or protective padding. Beyond medicine, clavus also survives as a classical term for the purple stripe worn on Roman tunics to signal social rank. Because ordinary English uses 'corn' instead, clavus remains largely confined to clinical notes, textbooks, and discussions of Roman dress, where it lends precision and historical flavor.
A corn: a hard, cone-shaped area of thickened skin on the foot, formed by pressure or friction and typically painful under weight-bearing.
"Padding and properly fitted shoes usually resolve a clavus without surgery."
Used almost exclusively by clinicians; the lay term is 'corn'.
In ancient Rome, a vertical stripe or band on the tunic indicating the wearer's rank or office.
"Only senators were entitled to the broad clavus on their tunics."
Encountered in classical scholarship rather than general usage.
As a Latin borrowing, clavus may take the Latin plural 'clavi', though anglicized plurals are sometimes seen in informal contexts.
"Both clavi were removed during the routine procedure."
The word 'clavus' is literally Latin for 'nail' — which is why doctors still describe a corn as feeling like you're walking with a nail pressed into your toe.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of clavus
Clavus comes directly from Latin, where it meant 'nail' or 'peg', reflecting the way a corn's hard core seems driven into the flesh like a tack. The same root gave English words such as 'enclave' and 'conclave' through related forms meaning something fastened or enclosed, and the spice 'cloves' via Old French 'clous', nails shaped like the dried flower buds. The word entered medical vocabulary as the technical designation for a corn, and it also named the rank-denoting stripe sewn onto Roman garments.
How clavus is actually used
Strictly a technical or historical term; everyday English speakers simply say 'corn'. Found mainly in dermatology, podiatry, and classics texts.
Easily confused with clavus
A callus is a broad, diffuse thickening of skin spread over an area, whereas a clavus (corn) is a small, sharply defined, cone-shaped lesion with a hard central core.