or  ack*ee  n :  the fruit of a tree (Blighia sapida of the family Sapindaceae) native to tropical West Africa but grown in the Caribbean area, Florida, and Hawaii for its white or yellowish fleshy aril which 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 .
 
 
 
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