Momordica charantia, known as bitter melon, bitter gourd, bitter squash, or balsam-pear in English, has many other local names. Goya from Okinawan and karela from Sanskrit are also used by English-language speakers.

It is a tropical and subtropical vine of the family Cucurbitaceae, widely grown in Asia, Africa, and the Caribbean for its edible fruit, which is extremely bitter. Its many varieties differ substantially in the shape and bitterness of the fruit.