The insert/overtype mode toggling is not global for the computer or even for a single application but rather local to the text input window in which the Insert key was pressed.
Wiktionary (0.00 / 0 votes) Rate this definition: high fructose corn syrup (Noun). Any of many corn syrups that has undergone an enzymatic processing to convert some of its glucose into fructose to produce a desired sweetness. Origin: high + fructose + corn syrup.
High Maltose Corn Syrup is another common sweetener -- simply the result of processing corn in a different way. Crystalline fructose is fructose derived from corn, though it is thought to be about 20 percent sweeter than sugar and 5 percent sweeter than high-fructose corn syrup.