a These levels are based on Estimated Energy Requirements (EER) from the Institute of Medicine Dietary Reference Intakes macronutrients report, 2002, calculated by gender, age, and activity level for reference-sized individuals.
The definition of a channel is a waterway, a means of communication and a specific television or radio frequency. An example of channel is the English Channel. An example of channel is writing. An example of channel is Fox News.
The word channel was first recorded in Middle English in the 13th century and was borowed from Old French chanel, variant form of chenel canal. The French name la Manche has been in use since at least the 17th century.