Plural: ackees

Red pear-shaped tropical fruit with poisonous seeds; flesh is poisonous when unripe or overripe; SYN. akee.
The fruit of an African tree (Blighia sapida) of the soapberry family grown in the Caribbean area, Florida, and Hawaii for its white or yellowish fleshy aril that is edible when ripe but is poisonous when immature or overripe and that has a toxic pink raphe attaching the aril to the seed; also; the tree.