Cella

A cella (from Latin for small chamber) or naos (from the Greek ναός, temple) is the inner chamber of a temple in classical architecture, or a shop facing the street in domestic Roman architecture, such as a domus. Its enclosure within walls has given rise to extended meanings, of a hermits or monks cell, and since the 17th century, of a biological cell in plants or animals.

Bio from Wikipedia - See more on en.wikipedia.org Text under CC-BY-SA license