cell
Pronunciation: /sɛl/
noun
- 1a small room in which a prisoner is locked up or in which a monk or nun sleeps: the authorities locked all remaining inmates in their cells
- historical a small monastery or nunnery dependent on a larger one.
- 2 Biology the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.
- an enclosed cavity in an organism.
- a small compartment in a larger structure such as a honeycomb.
- 3a small group forming a nucleus of political activity, typically a secret, subversive one: terrorist cells

Origin:
Old English, from Old French celle or Latin cella 'storeroom or chamber'