Cradle grain is a term used to describe grains that have been harvested by hand, usually with a sickle or scythe. The term is derived from the traditional method of harvesting grains, which was done by hand and involved cutting the grain stalks and then gathering them into a cradle-like shape. The term REAP, which is a four-letter word, is an acronym for 'Reaping and Processing, ' which is the process of harvesting and processing grains.