Hay
Hay means a grass or legume that has been cut and stored. Commonly used grass mixtures include rye grass, timothy, brome, fescue, coastal Bermuda, orchard grass, and other native species, depending on the region. Forage legumes include alfalfa and clovers.
Source
7 CFR § 1436.3
Scoping language
The following definitions will be applicable to the program authorized by this part and will be used in all aspects of administering this program: