S: (n) cell ((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)
S: (n) whole, unit (an assemblage of parts that is regarded as a single entity) "how big is that part compared to the whole?"; "the team is a unit"
S: (n) congener (a whole (a thing or person) of the same kind or category as another) "lard was also used, though its congener, butter, was more frequently employed"; "the American shopkeeper differs from his European congener"