- syllogism
- 1387, from O.Fr. silogisme "a syllogism," from L. syllogismus, from Gk. syllogismos "a syllogism," originally "inference, conclusion, computation, calculation," from syllogizesthai "bring together, premise, conclude," lit. "think together," from syn- "together" + logizesthai "to reason, count," from logos "a reckoning, reason."