The term 'Dairy Prefix' refers to words that are commonly used as prefixes for dairy-related terms. The three crossword solutions for this term are NON (3 letters), OLEO (4 letters), and LACT (4 letters). NON is derived from the Latin word 'nonnus, ' meaning 'NINE, ' and is often used to refer to non-dairy products. OLEO is derived from the Greek word 'oleum, ' meaning 'OIL, ' and is used to refer to products made with vegetable OIL instead of animal fat. Finally, LACT is derived from the Latin word 'lactare, ' meaning 'to milk, ' and is used to refer to products made from milk or other dairy products.