Fructose is commonly referred to as fruit sugar. I understand this is somewhat imprecise - that is, fructose is not found only in fruits - but the two terms are commonly used interchangeably. One of my dictionaries gives "fruit sugar" as one definition of "fructose"; the other gives "fructose" as the definition of "fruit sugar".
That's been annoying me for months.
-------------------- [Research tells us fourteen out of any ten individuals likes chocolate. - Sandra Boynton]