Te n 1: a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold [syn: {tellurium}, {atomic number 52}] 2: the syllable naming the seventh (subtonic) note of any musical scale in solmization [syn: {ti}, {si}]