The Collaborative International Dictionary of English v.0.48:

Apostrophize \A*pos"tro*phize\, v. t., [imp. & p. p.
   Apostrophized; p. pr. & vb. n. Apostrophizing.]
   1. To address by apostrophe.
      [1913 Webster]

   2. To contract by omitting a letter or letters; also, to mark
      with an apostrophe (') or apostrophes.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Apostrophize \A*pos"tro*phize\, v. i.
   To use the rhetorical figure called apostrophe.
   [1913 Webster]

WordNet (r) 3.0 (2006):

apostrophize
    v 1: use an apostrophe [syn: apostrophize, apostrophise]