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Definition of Atomic number 4
1. Noun. A light strong brittle grey toxic bivalent metallic element.
Exact synonyms: Be, Beryllium, Glucinium
Generic synonyms: Metal, Metallic Element
Substance meronyms: Beryl, Chrysoberyl, Gadolinite, Ytterbite
Generic synonyms: Metal, Metallic Element
Substance meronyms: Beryl, Chrysoberyl, Gadolinite, Ytterbite