The Collaborative International Dictionary of English v.0.48:

-ic \-ic\ [L. -icus, Gr. ?: cf. F. -ique.]
   1. A suffix signifying, in general, relating to, or
      characteristic of; as, historic, hygienic, telegraphic,
      etc.
      [1913 Webster]

   2. (Chem.) A suffix, denoting that the element indicated
      enters into certain compounds with its highest valence, or
      with a valence relatively higher than in compounds where
      the name of the element ends in -ous; as, ferric,
      sulphuric. It is also used in the general sense of
      pertaining to; as, hydric, sodic, calcic.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ic
    adj 1: being nine more than ninety [syn: ninety-nine, 99,
           ic]
    n 1: a group of government agencies and organizations that carry
         out intelligence activities for the United States
         government; headed by the Director of Central Intelligence
         [syn: Intelligence Community, National Intelligence
         Community, United States Intelligence Community, IC]

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

IC
       Integrated Circuit


The Free On-line Dictionary of Computing (30 December 2018):

IC

   1.  integrated circuit.

   2. Independent Carrier.

   3. Imperial College.

   (1997-04-12)