from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hard, brittle metallic element, found associated with nickel, silver, lead, copper, and iron ores and resembling nickel and iron in appearance. It is used chiefly for magnetic alloys, high-temperature alloys, and in the form of its salts for blue glass and ceramic pigments. Atomic number 27; atomic weight 58.9332; melting point 1,495°C; boiling point 2,900°C; specific gravity 8.9; valence 2, 3. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A chemical element (symbol Co) with an atomic number of 27.
- n. Cobalt blue.
from the GNU version of the Collaborative International Dictionary of English
- n. A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co.
- n. A commercial name of a crude arsenic used as fly poison.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Co; atomic weight, 58.8. A metal of a steel-gray color and a specific gravity variously given at from 8.52 to 8.95.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
German Kobalt, from Middle High German kobolt, variant of kobold, goblin (from silver miners' belief that cobalt had been placed by goblins who had stolen the silver).(American Heritage® Dictionary of the English Language, Fourth Edition)
From German Kobold ("goblin"). (Wiktionary)