SHADDOCK (Citrus decumana)  , a tree allied to the orange and the lemon, presumably native to the Malay and Polynesian islands, but generally cultivated throughout the tropics . The leaves are like those of the orange, but downy on the under surface, as are also the young shoots . The flowers are large and white, and are succeeded by very large globose fruits like oranges, but paler in colour, and with a more pungent flavour . The name Shaddock is asserted to be that of a captain who introduced the tree to the West Indies . The fruit is also known under the name of grape-fruit, pommeloes, and "forbidden fruit." Varieties occur with yellow and reddish pulp; and there are also pear-shaped varieties . ,SHADOOF (Arab. shack-if), an apparatus for drawing water, used in the East generally, and particularly on the Nile for the purpose of irrigation . It consists of an upright frame on which is suspended a long pole at a distance of about one-fifth of its length from one end; to the other end is attached a bucket or skin bag, while at the short end a weight is suspended serving as the counterpoise of a lever . The vessel containing the water is then swung round and emptied into the runnel, which conveys the water in the direction required .