\Al`ga*ro"ba\, n. [Sp. algarroba, fr. Ar. al-kharr?bah.
Cf. {Carob}.] (Bot.)
(a) The Carob, a leguminous tree of the Mediterranean region;
    also, its edible beans or pods, called {St. John's
    bread}.
(b) The Honey mesquite ({Prosopis juliflora}), a small tree
    found from California to Buenos Ayres; also, its sweet,
    pulpy pods. A valuable gum, resembling gum arabic, is
    collected from the tree in Texas and Mexico.