The Collaborative International Dictionary of English v.0.48:

CBC \CBC\ n.
   the complete blood count; a clinical test which counts the
   number of white and red blood cells and the number of
   platelets in one cubic milimeter of blood. [acronym]

   Syn: complete blood count, blood profile.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

CBC
    n 1: counting the number of white and red blood cells and the
         number of platelets in 1 cubic millimeter of blood [syn:
         complete blood count, CBC, blood profile]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CBC
       Cipher Block Chaining [mode] (DES, DESE, RC5, cryptography)