Definitions for pyxidiumpɪkˈsɪd i əm; pɪkˈsɪd i ə
Random House Webster's College Dictionary
pyx•id•i•umpɪkˈsɪd i əm; pɪkˈsɪd i ə(n.)(pl.)pyx•id•i•a
a seed vessel that opens transversely, the top part acting as a lid, as in the purslane.
Origin of pyxidium:
1825–35; < NL < Gk pyxídion, dim. of pyxís, s. pyxid- a box
fruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released
A seed capsule in the form of a box, the seeds being released when the top splits off.
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