'Septa' definitions:

Definition of 'Septa'

From: GCIDE

Septum \Sep"tum\, n.; pl. Septa. [L. septum, saeptum, an inclosure, hedge, fence, fr. sepire, saepire, to hedge in, inclose.]
1. A wall separating two cavities; a partition; as, the nasal septum. [1913 Webster]
2. (Bot.) A partition that separates the cells of a fruit. [1913 Webster]
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. [1913 Webster]