The Collaborative International Dictionary of English v.0.48:

Ideographic \I`de*o*graph"ic\, Ideographical
\I`de*o*graph"ic*al\, a. [Cf. F. id['e]ographique.]
   Of or pertaining to an ideogram; representing ideas by
   symbols, independently of sounds; as, 9 represents not the
   word "nine," but the idea of the number itself. --
   I`de*o*graph"ic*al*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ideographic
    adj 1: of or relating to or consisting of ideograms

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "ideographic":
   abecedarian, allographic, alphabetic, apish, capital, connotative,
   delineatory, demonstrative, denominative, denotative, depictive,
   designative, diagnostic, echoic, emblematic, embodying, evidential,
   exhibitive, expressive, figural, figurative, graphemic, graphic,
   identifying, idiosyncratic, illustrational, illustrative,
   imitative, implicative, incarnating, indicating, indicative,
   indicatory, individual, lettered, lexigraphic, limning, literal,
   logogrammatic, logographic, lower-case, majuscule, meaningful,
   metaphorical, mimetic, mimish, minuscular, minuscule, naming,
   onomatopoeic, pathognomonic, peculiar, personifying, pictographic,
   pictorial, portraying, representational, representative,
   representing, semantic, semiotic, signalizing, significant,
   significative, signifying, simulative, suggestive, symbolic,
   symbolistic, symbolizing, symbological, symptomatic,
   symptomatologic, transliterated, typical, typifying, uncial,
   upper-case, vivid