Clavus

Clavus may refer to:
 * Claudius Clavus (born 1388), 15th-century Danish cartographer
 * Clavus (gastropod), a genus of snails in the family Drilliidae
 * The Roman clavus, a reddish-purple stripe on garments that distinguished members of the senatorial and equestrian orders; see laticlave and angusticlavia
 * A shooting pain in the forehead, associated with hysteria, also called clavus hystericus
 * Corn (medicine), type of callus formed on the toes
 * The plant disease ergot
 * The pseudo-tail of the Molidae (sunfish)
 * In Hemiptera, a usually narrow strip of the hemelytron adjacent to the scutellum