The Collaborative International Dictionary of English v.0.48:

Ideograph \I*de"o*graph\, n.
   Same as Ideogram. Ideographic

WordNet (r) 3.0 (2006):

ideograph
    n 1: a graphic character that indicates the meaning of a thing
         without indicating the sounds used to say it; "Chinese
         characters are ideograms" [syn: ideogram, ideograph]