from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol In) with an atomic number of 49.
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a rare soft silvery metallic element; occurs in small quantities in sphalerite
ind(igo) + -ium (so called from the indigo-blue lines in its spectrum).(American Heritage® Dictionary of the English Language, Fourth Edition)
From ind(igo) + -ium, from the indigo lines in its spectrum (Wiktionary)