say it: PIK-sis
pyxis is a noun meaning "fruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released". It carries 3 recorded senses.
a constellation in the southern hemisphere near Puppis and Antlia
a small box used by ancient Greeks to hold medicines
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for pyxis come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.