Yes, cells is a Scrabble word!

Noun

1. Any small compartment

2. (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals

3. A device that delivers an electric current as the result of a chemical reaction

4. A small unit serving as part of or as the nucleus of a larger political movement

5. A hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver

6. Small room in which a monk or nun lives

7. A room where a prisoner is kept