tl 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 Synonym(s) thallium Tl atomic number 81
News & Articles tl UPDATE: 72-year-old triple murder suspect told friend he was "scared" the night of the deadly shooting Butte CountySuspect Donald Clark, 72, is known as a gentle community volunteer in the Centerville area. June 22, 2013 - KRCR TV Redding @Sree Sreenivasan to depart Columbia University CD… @sree Sreenivasan to depart Columbia University CDO for Met Museum: capi.tl/10xYDvI June 20, 2013 - NYConvergence @capitalnewyork asks which blogs stay and which go… @capitalnewyork asks which blogs stay and which go at ‘The New York Times’? capi.tl/1bSCat8 June 19, 2013 - NYConvergence