The Collaborative International Dictionary of English v.0.48:

Implicative \Im"pli*ca*tive\, a.
   Tending to implicate.
   [1913 Webster]

WordNet (r) 3.0 (2006):

implicative
    adj 1: tending to suggest or imply; "artifacts suggestive of an
           ancient society"; "an implicative statement" [syn:
           implicative, suggestive]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "implicative":
   allusive, allusory, connotative, demonstrative, denominative,
   denotative, designative, diagnostic, emblematic, evidential,
   exhibitive, expressive, figural, figurative, identifying,
   ideographic, idiosyncratic, implicational, implicatory, indicating,
   indicative, indicatory, individual, inferential, insinuating,
   insinuative, insinuatory, ironic, meaningful, metaphorical, naming,
   pathognomonic, peculiar, referential, representative, semantic,
   semiotic, signalizing, significant, significative, signifying,
   suggestive, symbolic, symbolistic, symbological, symptomatic,
   symptomatologic, typical