xenon
noun
- chemical element with atomic number of 54 and heaviest stable noble gas
Wiktionary
Pronunciation: /ˈziːnɒn/ / /ˈzinɑn/ / /ˈzinən/
noun
Etymology: From Ancient Greek ξένος (xénos, “foreign, strange”) + -on, used for all noble gases.
- The chemical element (symbol Xe) with an atomic number of 54. It is a colorless, odorless, unreactive noble gas, used notably in camera flash technology.