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.
Word Origin & History. medium 1584, a middle ground, quality, or degree, from L. medium, from neut. of adj. medius (see medial). Meaning intermediate agency, channel of communication is from 1605. That of person who conveys spiritual messages first recorded 1853, from notion of substance through which something is conveyed..