- A wall separating two cavities; a partition; as, the nasal
septum. - A partition that separates the cells of a fruit. - One of the radial calcareous plates of a coral. - One of the transverse partitions dividing the shell of a
mollusk, or of a rhizopod, into several chambers. See Illust. under
Nautilus. - One of the transverse partitions dividing the body cavity
of an annelid.
Definition
[ n.]