present participle of dial back

The use of a computer to dial a number repeatedly (usually to a crowded modem pool) in an attempt to gain access immediately after another user has hung up.

plural of dial number

plural of diagonal mark

(typography) Synonym of slash as the forward slash ⟨/⟩ and sometimes also its proscribed sense inclusive of the backslash ⟨\⟩.

A city and town in Iowa.

(category theory) A morphism from an object to the product of that object with itself, which morphism is induced by a pair of identity morphisms of the said object.

(geometry) A projection of a polytope from n-dimensional space to n-1 dimensions through a point beyond one of its faces; especially such a projection (itself represented in 2 dimensions) of a 3- or 4-dimensional polytope.

(dated) The provision of interactive video services, such as home shopping and films transmitted on demand, by traditional telecommunication networks.

(geometry, algebra) A Coxeter-Dynkin diagram.