- an inert, monatomic gaseous element, present in very small amounts in the atmosphere: used in high-power, tungsten-filament light bulbs. Symbol: Kr; atomic weight: 83.80; atomic number: 36.
Origin of krypton
Examples from the Web for krypton
In Earth One, a revenge-thirsty alien named Tyrell comes to Earth to kill the last son of Krypton.‘Man of Steel’ Is Fun to Watch, But It’s Still a Failure. Here’s Why.
June 15, 2013
Since Krypton is dying, Jor-El plots to send his newborn to a far-off planet and settles on earth.‘Man of Steel,’ New Superman Movie Starring Henry Cavill, Falls Flat
June 11, 2013
- an inert gaseous element occurring in trace amounts in air and used in fluorescent lights and lasers. Symbol: Kr; atomic no: 36; atomic wt: 83.80; valency: 0; density: 3.733 kg/m³; melting pt: –157.37°C; boiling pt: –153.23±0.10°C
Word Origin and History for krypton
inert gaseous element, 1898, coined by its discoverers (Sir William Ramsay and Morris W. Travers) from Greek krypton, neuter of adjective kryptos "hidden" (see crypt); so called because it was so difficult to find.
- A largely inert gaseous element used in gas fluorescent lamps, whose artificial radioisotope is used in diagnostic imaging. Atomic number 36.
- A colorless, odorless element in the noble gas group. It is used in certain fluorescent lamps and photographic flash lamps. Atomic number 36; atomic weight 83.80; melting point -156.6°C; boiling point -152.30°C; density 3.73 grams per liter (0°C). See Periodic Table.