noun, noun which may take the genitive case particle 'no'
single cell; unicellular
Biological term for organisms consisting of a single cell. Often used in scientific contexts.
Amoebas are single-celled organisms.
noun which may take the genitive case particle 'no', noun
simple-minded; one-track-minded
Colloquial, mildly derogatory term for a person who thinks in a simplistic, inflexible way, as if having only one brain cell.
He's so simple-minded he can only think about one thing at a time.