What is the meaning of Colocynth?

A viny plant, Citrullus colocynthis, native to the Mediterranean Basin and Asia. It produces a lemon-sized, yellowish, green-mottled, spongy, and extremely bitter fruit.

The powdered pulp of this fruit, a powerful hepatic stimulant and hydragogue cathartic used as a strong laxative.

Source: wiktionary.org