Mounce Concise Greek-English Dictionary

pr. a little horn; in NT a pod, the pod of the carob tree, or Ceratonia siliqua of Linnaeus, a common tree in the East and the south of Europe, growing to a considerable size, and producing long slender pods, with a pulp of a sweetish taste, and several brown shining seeds like beans, sometimes eaten by the poorer people in Syria and Palestine, and commonly used for fattening swine, Lk. 15:16*

Source: Mounce Concise Greek-English Dictionary