xenon xenomorphosis • xenoparasite · · · Info · Definitions · Synonyms · Characters · · xenon · · Text Latin · · Script 5 · · Length Definitions · · · (noun) a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts. Synonyms: Xe, atomic number 54. · · Noun Definition 1 Synonyms · · · xe · · Synonym 1 atomic number 54 · · Synonym 2 Characters · · e latin small letter e U+0065 n latin small letter n U+006E o latin small letter o U+006F x latin small letter x U+0078