PIETRA DURA Meaning of PIETRA DURA in English [ ˌpjɛtrə'du:rə ]■ noun pictorial mosaic work using semi-precious stones.OriginC19: from Ital. (plural pietre dure ), lit. 'hard stone'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004