Consisting of a single cell; = unicellular, adj. Also figurative.

Composed of several or many cells.

Composed or consisting of, having, a single cell; said esp. of the organisms belonging to the primary divisions of the animal and vegetable kingdoms.

Unicellular.

= multicellular, adj.

Of an organism: not composed of more than one cell (= unicellular, adj. 1); not divided into cells; syncytial.

= monoplast, n.

having or consisting of three cells.

involving or containing cells of more than one kind.

(esp. of synthetic substances) having or characterized by a structure consisting of small cells.