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.


The theca of mosses.


© Webster 1913.

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