CROP, the ingluvies, or pouched expansion of a bird's oesoph agus, in which the food remains to undergo a preparatory proc ess of digestion before being passed into the true stomach ; the produce of cereals or other cultivated plants. The term "white crop" is used for such grain crops as barley or wheat, which whiten as they grow ripe ; "green-crop" for such as roots or potatoes which do not, and also for those which are cut in a green state, like clover (see AGRICULTURE). Other uses of the word are, in leather-dressing, for the whole untrimmed hide ; in mining and geology, for the "outcrop" or appearance at the surface of a vein or stratum, and particularly in tin-mining, for the best part of the ore produced after dressing. A "hunting crop" is a short thick stock for a whip, with a small leather loop at one end, to which a thong may be attached. From the verb "to crop," i.e., to take off the top of anything, comes "crop" meaning a closely cut head of hair.