Bocardo

Part of speech: noun (n.)

1. A form of syllogism of which the first and third propositions are particular negatives, and the middle term a universal affirmative. Baroko and Bocardo have been stumbling blocks to the logicians. Bowen.

2. A prison; -- originally the name of the old north gate in Oxford, which was used as a prison. [Eng.] Latimer.