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From WordNet (r) 2.0 [wn]: Tl noun: a soft gray 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 [syn: {thallium}, {atomic number 81}] From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002) [vera]: TL Transform and Lighting (3D), "T&L" |
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