From The Collaborative International Dictionary of English v.0.44 [gcide]:
Ratiocinative \Ra'ti*oc"i*na*tive\ (r[a^]sh'[i^]*[o^]s"[i^]*n[asl]*t[i^]v), adjective [L. ratiocinativus.] Characterized by, or addicted to, ratiocination; consisting in the comparison of propositions or facts, and the deduction of inferences from the comparison; argumentative; as, a ratiocinative process.
From WordNet (r) 2.0 [wn]:
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