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atomic number 20 is a noun meaning "a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals". It carries one recorded sense.
a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
Definitions, synonyms and semantic relations for atomic number 20 come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.