Stir frying is a cooking technique in which ingredients are fried in a small amount of very hot oil while being stirred or tossed in a wok. The technique originated in China and in recent centuries has spread into other parts of Asia and the West. It is similar to sautéing in Western cooking technique.
Scholars think that wok (or pan) frying may have been used as early as the Han dynasty (206 B.C. – 220 A.D.) for drying grain, not for cooking, but it was not until the Ming dynasty (1368–1644) that the wok reached its modern shape and allowed quick cooking in hot oil. Well into the 20th century, while only restaurants and affluent families could afford the oil and fuel needed for stir fry, the most widely used cooking techniques remained boiling and steaming. Stir fry cooking came to predominate over the course of the century as more people could afford oil and fuel, and in the West spread beyond Chinese communities.
Stir frying and Chinese food have been recommended as both healthy and appealing for their skillful use of vegetables, meats, and fish which are moderate in their fat content and sauces which are not overly rich, provided calories are kept at a reasonable level.
The English-language term "stir-fry" was coined by Yuen Ren Chao in Buwei Yang Chao's book How to Cook and Eat in Chinese (1945), to describe the chǎo technique. Although using "stir-fry" as a noun is commonplace in English, in Chinese, the word 炒 (chǎo) is used as a verb or adjective only.