Definition of "xenon" []

• A colorless, odorless, highly unreactive gaseous element found in minute quantities in the atmosphere, extracted commercially from liquefied air and used in stroboscopic, bactericidal, and laser-pumping lamps. Atomic number 54; atomic weight 131.29; melting point -111.9°C; boiling point -107.1°C; density (gas) 5.887 grams per liter; specific gravity (liquid) 3.52 (-109°C). See Table at element. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "While krypton has a considerable vapour pressure at the temperature of boiling air, the vapour pressure of xenon is hardly appreciable; hence their separation, although tedious, presented no particular difficulty."
• "The word Xenon comes from the Greek word xenon which means stranger it was discovered by Sir William Ramsay in 1898."
• "The word Xenon comes from the Greek word xenon which means stranger it was discovered by Sir William Ramsay in 1898. has an Atomic Number of 86, the Atomic Symbol Rn, and the Atomic Mass of 222. 018g / mol."