See Also: pietra dura(dictionary)
pietra serena(dictionary)
pietra commessa(dictionary)
Dura(health)
dura(dictionary)
dura(medicine)
Dura mater(health)
lamina dura(medicine)
Dura-Europus(encyclopedia)
dura mater(medicine)

pietra dura (iou)



pietra dura noun phr. [pi,e:tra 'du:ra] Pl. pietre dure [pi,e:tre 'du:re]. E19.
[Italian, lit. 'hard stone'.]
Semiprecious stones; sing. & in pl., mosaic work of such stones.