The term 'Sugar Suffix' refers to a type of chemical suffix that is added to the end of a sugar molecule. The three crossword solutions for this term are OSE (3 letters), ITOL (4 letters), and ULOSE (5 letters). OSE stands for 'Oligosaccharide', which is a type of carbohydrate composed of a few simple sugars linked together. ITOL stands for 'Isopentenyltransferase', which is an enzyme involved in the synthesis of isoprenoid compounds. Lastly, ULOSE stands for 'Uronic Acid', which is a type of sugar acid found in many polysaccharides.