Definition of "superfruit"

This lemon, grown by Robert Jennings of Downey, California, weighs five pounds and is eight inches tall and twenty-three inches around. Genetic engineering could produce such superfruits consistently.

1986, Walter G. Oleksy, Miracles of Genetics‎, Childrens Press, page 17

Among his picks: Superfruits. With summer long gone, it may not seem a good time to be pitching fruit. But three of Pratt's new power foods are fruits that are currendy in season — pomegranates, kiwis and apples.

2005, Newsweek‎, Newsweek, page 79

Pomegranates, those cheerful round red fruits often seen in wintertime fruit bowls, have quickly gained a reputation as superfruits, so thoroughly packed are they with antioxidants, especially deep red anthocyanins.

2009, Nancy Harmon Jenkins, The New Mediterranean Diet Cookbook: A Delicious Alternative for Lifelong Health‎, Bantam Books, page 410