word-forming element meaning "having one only," from Latin uni-, combining form of unus "one" (from PIE root *oi-no- "one, unique").
cellular adj.
1753, "consisting of or resembling cells," with reference to tissue, from Modern Latin cellularis "of little cells," from cellula "little cell," diminutive of cella "small room" (see cell). Of mobile phone systems (in which the area served is divided into "cells" of a few square miles served by transmitters), 1977. Related: Cellularity.