The Collaborative International Dictionary of English v.0.48:
Xe \Xe\, n. The chemical symbol for the chemical element xenon, having atomic number 54; it is one of the six noble gases. Syn: xenon. [WordNet 1.5]WordNet (r) 3.0 (2006):
Xe n 1: a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts [syn: xenon, Xe, atomic number 54]