noun

• A synthetic crystal of yttrium aluminium garnet, used in certain lasers and as an imitation diamond in jewellery.

  ‘Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density applications.’

  More example sentences

  • ‘Invented in the sixties of the last century, Nd:YAG(Neodimium Doped Yttrium Aluminum Garnet) has been and continue to be the most widely used laser crystal.’