Colocynth /(?)/

Col·ocynth

Colocynth

n.
  1. 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. (Med.)