Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • The symbol for the element thallium.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Symbol for thallium.
  • n. Symbol for the teraliter (teralitre), an SI unit of fluid measure equal to 1012 liters (litres).

from The Century Dictionary and Cyclopedia

  • n. The chemical symbol of the metal thallium.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. 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

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