plural of extension cord

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

plural of extension table

(mathematics, logic) An extension of a logical theory such that every theorem expressible in the original theory is also derivable within the original theory.

The extension of the advantages of university instruction by means of lectures and classes at various centres.

plural of extension block

(category theory) A construct that generalizes the notion of extending a function's domain of definition.

plural of extension field

A property of a component or system that is a function of the whole component, a property that changes if material is added or subtracted to the component

(Scouting) A program within Scouting which caters for young people with special needs.