eversio

Eversio is a term used in anatomy and medicine to denote the act or process of turning outward, i.e., eversion. The word is derived from Latin, with eversio meaning an outward turning, from eversus (turned outward) or from the verb vertere (to turn).

In clinical usage, eversio describes the outward turning of a body part. Common examples include eversion of the foot, where the sole turns away from the midline, and eversio palpebrae, the eversion or turning outward of the eyelid margin. The term can be applied to other tissues and organs where outward turning or exposure of the surfaces occurs.

Eversio is often treated as the Latin counterpart to the English term eversion. In modern English medical writing, eversion is the more commonly used word, while eversio appears primarily in formal Latin phrases, traditional dictionaries, or in certain surgical and anatomical contexts.

Differences from related terms are notable: inversio (inversion) denotes turning inward, while eversio denotes turning outward. Both terms are used to describe positional changes of body parts, and their precise use depends on the part involved and the clinical context.

See also: eversion, inversion, ectropion, entropion, palpebral eversion.