(algebra, Galois theory) An algebraic extension that is both a normal and a separable extension; equivalently, an algebraic extension E/F such that the fixed field of its automorphism group (Galois group) Aut(E/F) is the base field F.

Alternative form of overextension.

plural of under-extension

plural of over-extension

Alternative form of underextension.

A table (furniture) constructed so that it can be extended or contracted in length.

plural of extension table

plural of extension block

(telecommunications) The transmission path originating from the interface of the access provider's side of a telecommunications circuit Demarcation Point within a premise and ending at the termination point prior to the interface of the edge Customer Premises Equipment. This may include in-segment equipment, media converters and patch cords as required to complete the circuit's transmission path to the edge CPE.

plural of extension cord