one-celled

Single unit lifeform

One-celled describes organisms consisting of a single cell, synonymous with unicellular.

Amoebas, bacteria, and many algae are one-celled: One-celled organisms were the first life on Earth.

The term appears in biology education and general science writing, while technical literature typically uses unicellular.

organism

amoeba

Shape-shifting single-celled organism

protozoan · diatom · ciliate · flagellate · archaea · cyanobacteria · giardia · chlamydomonas · dinoflagellate · spirochete

Opposites
cellular complexity

one-celledmulticellular

Having multiple cells

multicelled · differentiated · colonial · multi-celled · organized

Family

one, cell, celled, ones, cells, cellular, cellar, unicellular, multicellular

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G