Meaning

noun fruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released

noun a constellation in the southern hemisphere near Puppis and Antlia

noun a small box used by ancient Greeks to hold medicines

originNamed by the French astronomer Nicolas-Louis de Lacaille in 1763, and originally called Pyxis Nautica (“nautical compass”), from Latin pyxis (“little box”).

Etymology from Wiktionary, CC BY-SA 3.0