[ seld ]


  1. having a cell or cells (often used in combination):

    The ameba is a single-celled animal.

Discover More

Word History and Origins

Origin of celled1

First recorded in 1640–50; cell + -ed 3
Discover More

Example Sentences

These single-celled microbes can resemble bacteria but are quite different and play a different role in soils.

They’re not expecting anything more than microbes — bacteria-like, or other single-celled organisms.

From Vox

In all other multicellular life studied to date — and in most single-celled eukaryotes, for that matter — mitochondria produce ATP in a five-step process.

Members of Gore’s laboratory at the Massachusetts Institute of Technology spend their days creating, poking and prodding isolated islands of single-celled bacteria or yeast living in each of those wells.

This word describes a single-celled microbe that moves by shape-shifting.

Evolution explains how complex and intelligent life developed from simple one-celled organisms.

In the lower orders of one-celled algæ, reproduction takes place by simple cell division.

In a one-celled individual, there is no distinction between germinal and bodily functions.

After a few days more, however, several kinds of one-celled animals may appear, some of which prey upon others.

This is a one-celled animal known as the paramœcium or the slipper animalcule (because of its shape).

When conditions unfavorable for life come, the amœba, like some one-celled plants, encysts itself within a membranous wall.