1. A soft, malleable, silvery-white metallic element found primarily in ores of zinc and tin, used as a plating over silver in making mirrors, in plating aircraft bearings, and in compounds for making transistors. atomic number 49; atomic weight 114.82; melting point 156.61°C; boiling point 2,080°C; specific gravity 7.31; valence 1, 2, 3. see table at element.

1. A metallic chemical element (symbol in) with an atomic number of 49.

1. A rare metallic element, of atomic number 49, discovered in certain ores of zinc, by means of its characteristic spectrum of two indigo blue lines; hence, its name. in appearance it resembles zinc, being white or lead gray, soft, malleable and easily fusible, but in its chemical relation it resembles aluminium or gallium (valence +3). symbol in. atomic weight, 114.82.

1. chemical symbol, in; atomic weight, 113.7. A rare metallic element found in the zinc-blende of Freiberg, saxony, and some other localities, and discovered by means of the spectroscope: so called from its giving a blue line in the spectrum.

1. a rare soft silvery metallic element; occurs in small quantities in sphalerite