Pronunciation: (chōl'yä, -yu; Sp. chô'yä), [key]
—pl. chol•lasPronunciation: (chōl'yäz, -yuz; Sp. chô'yäs). [key]
any of several spiny treelike cacti belonging to the genus Opuntia, esp. O. fulgida of the southwestern U.S. and Mexico, having knobby outgrowths and yellow spines.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.