A form of traction for fractures of the femur, involving a weight and pulley.

(algebra, field theory) A field extension obtained by adjoining a single element to a given field.

(algebra) A finite (and thereby algebraic) extension of a base field such that every element of the extension is the root of a separable polynomial over the base field.

(electronics) An extension lead that rolls up, usually into the socket end, which in some cases has more than one socket on it (often 2 or 4).

(electronics, UK) extension cord

Alternative spelling of coextensive

Alternative form of underextension.

Alternative form of overextension.

The concept of extending the human lifespan. / An extension in the life of assets beyond their planned life.

(computing, rare) An extension, enrichment or continuation of a declaration of a function.