DictionarycellLiving unit
noun

cell

SEL/sel/

The smallest structural and functional unit of a living organism.

The diagram shows a cell with its membrane and nucleus.

A clear educational cutaway of one animal cell with membrane, nucleus and a few organelles, no labels.
Etymology

The image of a small room was extended to compartments and cavities in biological structures, including wood. This use gradually narrowed to the basic structural unit of living organisms.

In context

UF / IFAS Extension Pinellas County70:55
the term cell as it is applied to living organism tissues tissues being made of cells cell was applied to these structures because of someone looking at plant cells under the microscope
Botanical Science for Beginners

More examples

  • Cells divide as the tissue grows.
  • A single cell can perform many complex functions.
  • The microscope revealed damaged cells near the edge.

Forms

cell · cells

cellular adjective — Relating to living cells.