python (n.) Look up python at Dictionary.com
1580s, fabled serpent, slain by Apollo near Delphi, from Latin Python, from Greek Python "serpent slain by Apollo," probably related to Pytho, the old name of Delphi, perhaps itself related to pythein "to rot," or from PIE *dhubh-(o)n-, from *dheub- "hollow, deep, bottom, depths," and used in reference to the monsters who inhabit them. Zoological application to large non-venomous snakes of the tropics is from 1836, originally in French.
Pythonesque (adj.) Look up Pythonesque at Dictionary.com
1975, in reference to the style of humor popularized by British TV series "Monty Python's Flying Circus."
pythoness (n.) Look up pythoness at Dictionary.com
late 14c., "woman with the power of soothsaying," from Old French phitonise (13c.), from Late Latin pythonissa, used in Vulgate of the Witch of Endor (I Sam. xxviii:7), and often treated as her proper name, literally fem. of pytho "familiar spirit;" which ultimately is connected with the title of the prophetess of the Delphic Oracle, Greek pythia hiereia, from Pythios, an epithet of Apollo, from Pytho, older name of the region of Delphi (see python).
pyuria (n.) Look up pyuria at Dictionary.com
1811, from pyo- + -uria (see urine).
pyx (n.) Look up pyx at Dictionary.com
c.1400, "a box," especially the vessel in which the host or consecrated bread is preserved, from Latin pyxis, from Greek pyxis "box-wood; a box," from pyxos "box-wood; box-tree," of uncertain origin.