Kinesics

Kinesics is the interpretation of body communication such as facial expressions and gestures, nonverbal behavior related to movement of any part of the body or the body as a whole. The equivalent popular culture term is body language, a term Ray Birdwhistell, considered the founder of this area of study,^[1] neither used nor liked (on the grounds that what can be conveyed with the body does not meet the linguist's definition of language).