Pȳx-ĭd'i-ŭm, n.

noun

n.; pl. PYX-ĭD'ĭ-Ĭ. [N. Lat., Gr. πυξίδιον, diminutive of πυξίς, a box; Fr. pyxide. See supra.] (Bot.) (a.) A pod which divides circularly into an upper and lower half, of which the former acts as a kind of lid, as the pimpernel. (b.) The theca of mosses.

An open seed capsule with its lid raised and rounded seeds visible inside. — Pyxidium. (a.)