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Webster 1913 Edition
Pyxidium
‖
Pyx-id′i-um
,Noun.
pl.
Pyxidia
(#)
. [NL., fr. Gr. [GREEK], dim. a [GREEK] 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.