Corsned

In Old English Law. A piece of barley bread, which, after the pronunciation of certain imprecations, a person accused of crime was compelled to swallow. A piece of cheese or bread of about an ounce weight was consecrated with an exorcism desiring of the Almighty that it might cause convulsions and paleness, and find no passage, if the man was really guilty, but might turn to health and nourishment if he was innocent.

Spelman, Gloss. 439.

It was then given to the suspected person, who at the same time received the sacrament. If he swallowed it easily, he was esteemed innocent; if it choked him, he was esteemed guilty.

See 4 Bla. Com. 345.