Merriam-Webster Collegiate Dictionary - crop

 I. noun  Etymology: Middle English, craw, head of a plant, yield of a field, from Old English ~p craw, head of a plant; akin to Old High German kropf goiter, craw  Date: before 12th century  1. a pouched enlargement of the gullet of many birds that serves as a receptacle for food and for its preliminary maceration; also an enlargement of the gullet of another animal (as an insect)  2.  a.  (1) a plant or animal or plant or animal product that can be grown and harvested extensively for profit or subsistence an apple ~ a ~ of wool  (2) the total yearly production from a specified area  b. the product or yield of something formed together the ice ~  c. a batch or lot of something produced during a particular cycle the current ~ of films  d. collection a ~ of lies  3. the stock or handle of a whip; also a riding whip with a short straight stock and a loop  4. ~ (II)  a. the part of the chine of a quadruped (as a domestic cow) lying immediately behind the withers — usually used in plural; see cow illustration  b. an earmark on an animal; especially one made by a straight cut squarely removing the upper part of the ear  c. a close cut of the hair  II. verb  (~ped; ~ping)  Date: 13th century  transitive verb  1.  a. to remove the upper or outer parts of ~ a hedge ~ a dog's ears  b. harvest ~ trout  c. to cut off short ; trim ~ a photograph  2. to cause (land) to bear a ~ planned to ~ another 40 acres; also to grow as a ~  intransitive verb  1. to feed by ~ping something  2. to yield or make a ~  3. to appear unexpectedly or casually problems ~ up daily