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Definition of Atomic number 81
1. Noun. A soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores.
Exact synonyms: Thallium, Tl
Generic synonyms: Metal, Metallic Element
Substance meronyms: Blende, Sphalerite, Zinc Blende
Generic synonyms: Metal, Metallic Element
Substance meronyms: Blende, Sphalerite, Zinc Blende