What is "pitahaya"

Pitahaya \Pit`a*ha"ya\, n. [Sp., prob. from the native name.] (Bot.) A cactaceous shrub ( Cereus Pitajaya) of tropical America, which yields a delicious fruit.

n. (alternative form of pitaya English)

1. n. cactus of the southwestern United States and northern Mexico having edible juicy fruit [syn: pitahaya cactus, Acanthocereus tetragonus, Acanthocereus pentagonus]

2. highly colored edible fruit of pitahaya cactus having bright red juice; often as large as a peach