fruit sugar

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. See fructose.

Century Dictionary and Cyclopedia

1. n. Same as levulose.

GNU Webster's 1913

1. n. (Chem.) a kind of sugar occurring, naturally formed, in many ripe fruits, and in honey; levulose. The name is also, though rarely, applied to invert sugar, or to the natural mixture or dextrose and levulose resembling it, and found in fruits and honey.
2. n. See under Fruit, and Fructose.

WordNet 3.0

1. n. a simple sugar found in honey and in many ripe fruits