Cacajao Ca*ca*j[~a]o", n. [Pg.] (Zo["o]l) A South American short-tailed monkey (Pithecia (or Brachyurus) melanocephala). [Written also cacajo.], Pigeon grass (Bot.), a kind of foxtail grass (Setaria glauca), of some value as fodder. The seeds are eagerly eaten by pigeons and other birds. Pigeon hawk. (Zo["o]l.) (a) A small American falcon (Falco columbarius). The adult male is dark slate-blue above, streaked with black on the back; beneath, whitish or buff, streaked with brown. The tail is banded. (b) The American sharp-shinned hawk (Accipiter velox, or fuscus). Pigeon hole. (a) A hole for pigeons to enter a pigeon house. (b) See Pigeonhole. (c) pl. An old English game, in which balls were rolled through little arches. --Halliwell. Pigeon house, a dovecote. Pigeon pea (Bot.), the seed of Cajanus Indicus; a kind of pulse used for food in the East and West Indies; also, the plant itself. Pigeon plum (Bot.), the edible drupes of two West African species of Chrysobalanus (C. ellipticus and C. luteus). Pigeon tremex. (Zo["o]l.) See under Tremex. Pigeon wood (Bot.), a name in the West Indies for the wood of several very different kinds of trees, species of Dipholis, Diospyros, and Coccoloba. Pigeon woodpecker (Zo["o]l.), the flicker. Prairie pigeon. (Zo["o]l.) (a) The upland plover. (b) The golden plover. [Local, U.S.], Angola pea An*go"la pea` (Bot.) A tropical plant (Cajanus indicus) and its edible seed, a kind of pulse; -- so called from Angola in Western Africa. Called also pigeon pea and Congo pea., Dal Dal, n. [Hind.] Split pulse, esp. of Cajanus Indicus. [East Indies], Elcaja El*ca"ja, n. [Ar.] (Bot.) An Arabian tree (Trichilia emetica). The fruit, which is emetic, is sometimes employed in the composition of an ointment for the cure of the itch.