tl

Noun
  1. 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 (synset 114681997)
    is a type of: metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
    substance meronym: blende, sphalerite, zinc blende - an ore that is the chief source of zinc; consists largely of zinc sulfide in crystalline form
    same as: atomic number 81, thallium

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