Pronunciation: ( jak'frOOt"),[key] —n. 1. a large, tropical, milky-juiced tree, Artocarpus heterophyllus, of the mulberry family, having stiff and glossy green leaves, cultivated for its very large, edible fruit and seeds.
2. the fruit of this tree, which may weigh up to 70 lb. (32 kg). Also called jak, jack.