Sep·tum n.; pl. Septa
1. A wall separating two cavities; a partition; as, the nasal septum.
2. Bot. A partition that separates the cells of a fruit.
3. Zool. (a) One of the radial calcareous plates of a coral. (b) One of the transverse partitions dividing the shell of a mollusk, or of a rhizopod, into several chambers. See Illust. under Nautilus. (c) One of the transverse partitions dividing the body cavity of an annelid.
n 1: (anatomy) a dividing partition between two tissues or
2: a partition or wall especially in an ovary
[also: septa (pl)]