The term "white" corresponds to which of the following prefixes?

The prefix that corresponds to the term "white" is leuk/o. This prefix derives from the Greek word "leukos," which means "white" or "bright." It is commonly used in medical terminology to denote conditions related to white blood cells, such as in "leukemia," which refers to a cancer of the blood that affects white blood cells.

In contrast, the other prefixes have different meanings: hidr/o relates to sweat; lute/o refers to yellow, often used concerning the luteal phase in reproductive biology; and melan/o signifies black or dark, primarily associated with melanin and conditions involving pigmentation. Therefore, leuk/o is the correct choice for indicating the concept of "white."