Reproduction of a die impression by means of a cast.

1. The strength of the ethyl alcohol in distilled spirits; in the United States, each degree of proof is equal to 0.5% of alcohol by volume.

2. To activate yeast by mixing it with water or milk and letting the mixture stand for a given period of time.

The inked impression of composed type or a plate; used for inspection purposes or for pasting up with other artwork.

A deductive demonstration of a mathematical statement.