Colocynth \Col"ocynth\, n. [L. colocynthis, Gr. ?. Cf. Coloquintida.]

(Med.) The light spongy pulp of the fruit of the bitter cucumber (Citrullus colocynthis, or Cucumis colocynthis), an Asiatic plant allied to the watermelon; coloquintida. It comes in white balls, is intensely bitter, and a powerful cathartic. Called also bitter apple, bitter cucumber, bitter gourd. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Colocynth \Col"ocynth\, n. [L. colocynthis, Gr. ?. Cf. Coloquintida.]

(Med.) The light spongy pulp of the fruit of the bitter cucumber (Citrullus, or Cucumis, colocynthis), an Asiatic plant allied to the watermelon; coloquintida. It comes in white balls, is intensely bitter, and a powerful cathartic. Called also bitter apple, bitter cucumber, bitter gourd.

Source: Webster's Revised Unabridged Dictionary (1913)