from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hard, silvery-white metallic element used to toughen alloy steels and soften tungsten alloy. An essential trace element in plant nutrition, it is used in fertilizers, dyes, enamels, and reagents. Atomic number 42; atomic weight 95.94; melting point 2,617°C; boiling point 4,612°C; specific gravity 10.22 (at 20°C); valence 2, 3, 4, 5, 6. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol Mo) with an atomic number of 42.
from the GNU version of the Collaborative International Dictionary of English
- n. A rare element of the chromium group, occurring in nature in the minerals molybdenite and wulfenite, and when reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic number 42. Atomic weight 95.94.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Mo; atomic weight, 95. 8. A metal of a silver-white color, but harder than silver, which fuses with difficulty, if at all, at the highest temperature of a wind-furnace.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
New Latin, from earlier molybdena, lead ore, from Latin molybdaena, galena, from Greek molubdaina, from molubdos, lead.(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin molybdenum, from Ancient Greek μόλυβδος ("lead"), because the two elements are so similar they were often confused. (Wiktionary)