%bocardo%

n. [ A mnemonic word. ] 1. (Logic) A form of syllogism of which the first and third propositions are particular negatives, and the middle term a universal affirmative. [ 1913 Webster ]

Baroko and Bocardo have been stumbling blocks to the logicians. Bowen. [ 1913 Webster ]

2. A prison; -- originally the name of the old north gate in Oxford, which was used as a prison. [ Eng. ] Latimer. [ 1913 Webster ]