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pyxidia |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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.