zircon
{n: hyacinth, jacinth} a red transparent variety of zircon used as a gemstone
{n: jargoon, jargon} a colorless (or pale yellow or smoky) variety of zircon
{n: zircon, zirconium silicate} a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
{n: zirconium, Zr, atomic number 40} a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon
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