Dictionary.net

A bitter principle extracted as a white crystalline substance from the calumba root.

A bitter principle extracted as a white crystalline substance from the calumba root.

An amaroid, C21H24O7, from calumba, occurring in colorless needles and prisms; it is upon the presence of this that the bitterness of the crude drug depends.

A principle obtainable from calumba.

A bitter principle, C22H24O7, found in calumba.