CU

from WordNet (r) 3.0 (2006)

Cu
    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}]

from The Collaborative International Dictionary of English v.0.48

Cu \Cu\ n.
   the chemical symbol for {copper}.

   Syn: copper.
        [WordNet 1.5]

from The Free On-line Dictionary of Computing (8 July 2008)

CU

   <chat> "see you".

   (1997-12-01)

from The Free On-line Dictionary of Computing (8 July 2008)

cu

   1. <communications> {Call Unix}.

   2. <networking> The {country code} for Cuba.

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

CU
       Call Up (Unix)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

CU
       [L]       [see you [Later]] (slang, Usenet, IRC)