What does cell mean?
A cell is fundamentally a small, self-contained unit — a concept that unites its many uses in English. In biology, the cell is the smallest structural and functional unit of every living organism, from bacteria to blue whales, capable of carrying out the processes that sustain life. The word also describes small enclosed spaces: a prisoner's cell is a confined room, while a monastic cell was traditionally a monk's modest dwelling. Beyond rooms, "cell" extends to compartments within larger structures — the hexagonal cells of a honeycomb, the individual units inside an electrical battery, or the discrete components of a spreadsheet grid. It can even describe a small, tight-knit group operating within a larger organization, as in a resistance or terrorist cell. Derived from Latin via Old French, the word entered English around the fourteenth century. Its remarkable versatility makes "cell" essential vocabulary across science, technology, law, religion, and everyday conversation.
The smallest structural and functional unit of a living organism; also a small enclosed room or compartment.
"Nerve cells transmit signals throughout the body."
In scientific contexts, the plural "cells" typically refers to multiple biological units.
A compartment in a larger structure or device, such as a battery cell or a cell in a honeycomb.
"Each cell of the solar panel converts sunlight into electricity."
The standard plural applies to both biological units and physical compartments.
"Red blood cells carry oxygen through the bloodstream."
Robert Hooke named the 'cell' after the tiny rooms monks slept in — because cork cells under his microscope looked just like them.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cell
The English word "cell" derives from the Latin "cella," meaning a small room or storeroom, which passed into Middle English through Old French "celle" in the fourteenth century. Originally referring to a monk's dwelling, its sense broadened over centuries to any small enclosed space. In the seventeenth century, Robert Hooke famously applied the term to the microscopic structures he observed in cork, giving biology one of its most fundamental words.
Related word forms
How cell is actually used
"Cell" is a neutral word used across scientific, legal, religious, and everyday registers. In biology it carries no emotional weight, but in phrases like "terrorist cell" it can carry ominous connotations of secrecy. Its meaning is almost always clarified by context.
Easily confused with cell
"Cell" refers to a biological unit or small room/compartment, while "sell" is a verb meaning to exchange goods for money.