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.
the fruit of this tree, which may weigh up to 70 pounds (32 kg).
Also called jak, jack.

1810–20; jack2 + fruit

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World English Dictionary
jackfruit or jakfruit (ˈdʒækˌfruːt)
1.  a tropical Asian moraceous tree, Artocarpus heterophyllus
2.  the edible fruit of this tree, which resembles breadfruit and can weigh up to 27 kilograms (60 pounds)
[C19: from Portuguese jaca, from Malayalam cakka]
jakfruit or jakfruit
[C19: from Portuguese jaca, from Malayalam cakka]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica


(species Artocarpus heterophyllus), tree native to tropical Asia and widely grown throughout the wetland tropics for its large fruits and durable wood. Like its relative the breadfruit, it belongs to the mulberry family (Moraceae). The jackfruit is 15 to 20 m (50 to 70 feet) tall at maturity, has large stiff, glossy green leaves 15 to 20 cm (6 to 8 inches) long, and fruit up to 60 cm (about 2 feet) long and weighing up to 18 kg (about 40 pounds)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Big lumbering jackfruit in a jackfruit tree and a scratching bunch of chickens.
Jackfruit should be promoted as a livestock feed supplement.
Jackfruit leaves are commonly used for feeding goats.
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