(n) a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel, Syn. Mo, atomic number 42
(n) a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry, Syn. atomic number 46, Pd
(n) a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum, Syn. Rh, atomic number 45
(n) a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography, Syn. atomic number 47, Ag
(n) 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, Syn. atomic number 40, Zr