There was once a difference in classification that a Dwarf was below 4' 10, but above 4'' a Midget being 3'- 4' at maturity. However, certainly in England the terms are seen as inter-changeable. Ironically I am good friends with a genetically short family.
Just an example. A sweet onion is about 7% sugar, in-which about 40% of that is Fructose. A white onion (or any non-sweet type) is about 5% sugar, in-which less than 40% is Fructose. The amount of Fructose you are getting from even a few ounces of onion is minute. This Fructose is also bound with the flesh (Fiber) and other forms of sugar (Sucrose and Glucose).
In plants up to 1000 fructose units can be linked in a single fructan-molecule. Bacterial fructans can consist of up to 100.000 fructose units. The structure of fructans and fructan-derived oligosaccharides is generally abbreviated as GF x, with G indicating a glucose unit and F x the number of fructose units.