A gaseous element, atomic no. 54, atomic wt. 131.29; present in minute proportion (0.087 ppm) in the dry atmosphere; produces general anesthesia in concentrations of 70 vol.%. [G. xenos, a stranger]
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xe·non 'zē-.nän, 'zen-.än n a heavy, colorless, and relatively inert gaseous element that occurs in air as about one part in 20 million by volume symbol Xe see ELEMENT (table)
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xe·non (Xe) (zeґnon) [Gr. xenos stranger] a chemically unreactive gaseous element found in the atmosphere; atomic number, 54; atomic weight, 131.30.Medical dictionary. 2011.