What is "rice milk"

n. A milky liquid made from rice and used as a milk substitute, cooking ingredient or beverage.

Rice milk is a grain milk made from rice. It is mostly made from brown rice and commonly unsweetened. The sweetness in most rice milk varieties is generated by a natural enzymatic process that cleaves the carbohydrates into sugars, especially glucose, similar to the Japanese amazake. Some rice milks may nevertheless be sweetened with sugarcane syrup or other sugars.