D defs.my
Entry 1 sense Webster, 1913

Pietra dura

· Pi·e·tra du·ra · IPA
01 Hard and fine stones in general, such as are used for inlay and the like, as distinguished from the softer stones used in building; thus, a…
  1. 1.
    Hard and fine stones in general, such as are used for inlay and the like, as distinguished from the softer stones used in building; thus, a Florentine mosaic is a familiar instance of work in pietra dura, though the ground may be soft marble.(Fine Arts)