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pyxidium
CIDE DICTIONARY
pyxidium, n. [NL., fr. Gr. , dim. a a box. See Pyx.].
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. [1913 Webster]
OXFORD DICTIONARY
pyxidium, n. (pl. pyxidia) Bot. a seed-capsule with a top that comes off like the lid of a box.
Etymology
mod.L f. Gk puxidion, dimin. of puxis: see PYXIS
For further exploring for "pyxidium" in Webster Dictionary Online
