piemontitePronunciation: /ˈpiːmɒntʌɪt/Definition of piemontite noun [mass noun] a brown or black mineral consisting of a silicate of calcium, aluminium, iron, and manganese. Origin: late 19th century: from Italian Piemonte (see Piedmont) + -ite1piemontite in other Oxford dictionaries Definition of piemontite in the US English dictionary
