'Pyxidia' definitions:

Definition of 'Pyxidia'

From: GCIDE

Pyxidium \Pyx*id"i*um\, n.; pl. Pyxidia. [NL., fr. Gr. ?, dim. a ? a box. See Pyx.] (Bot.) (a) A pod which divides circularly into an upper and lower half, of which the former acts as a kind of lid, as in the pimpernel and purslane. (b) The theca of mosses. [1913 Webster]