Wordnet 3.0
NOUN (1)
1. 
 a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; 
 occurs in various minerals but is the only metal that occurs abundantly in large masses; 
 used as an electrical and thermal conductor; 
[syn: copper, Cu, atomic number 29]
WordNet (r) 3.0 (2006):
atomic number 29
    n 1: a ductile malleable reddish-brown corrosion-resistant
         diamagnetic metallic element; occurs in various minerals
         but is the only metal that occurs abundantly in large
         masses; used as an electrical and thermal conductor [syn:
         copper, Cu, atomic number 29]