argonon
English Thesaurus
1. any of the chemically inert gaseous elements of the helium group in the periodic table (noun.substance)
| hypernym | : | chemical element, element, |
| definition | : | any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter (noun.substance) |
| hypernym | : | gas, |
| definition | : | a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely (noun.substance) |
| hyponym | : | ar, argon, atomic number 18, |
| definition | : | a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere (noun.substance) |
| hyponym | : | atomic number 2, he, helium, |
| definition | : | a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) (noun.substance) |
| hyponym | : | atomic number 36, kr, krypton, |
| definition | : | a colorless element that is one of the six inert gasses; occurs in trace amounts in air (noun.substance) |
| hyponym | : | atomic number 10, ne, neon, |
| definition | : | a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts (noun.substance) |
| hyponym | : | atomic number 86, radon, rn, |
| definition | : | a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health (noun.substance) |
| hyponym | : | atomic number 54, xe, xenon, |
| definition | : | a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts (noun.substance) |
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