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).
Fructose, or fruit sugar, naturally occurs in fruits and vegetables. As a single-unit sugar, or monosaccharide, it combines with glucose to create a polysaccharide called sucrose, or table sugar.