- syllogism
- late 14c., 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."