(noun) A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.
Thallium tanım:
Kelime: thal·li·um Söyleniş:'tha-lE-&m İşlev:noun Kökeni: New Latin, from Greek thallos green shoot; from the bright green line in its spectrum : a sparsely but widely distributed poisonous metallic element that resembles lead in physical properties and is used chiefly in the form of compounds in photoelectric cells or as a pesticide -- see ELEMENT table