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.
Fructose is also derived from the digestion of granulated table sugar (sucrose), a disaccharide consisting of glucose and fructose, and high fructose corn syrup (HFCS). Crystalline fructose and high fructose corn syrup are often mistakenly confused as the same product. The former is simply pure (100%) fructose.