noun.
The state of being emaciated or reduced to excessive leanness; an excessively lean condition.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
extreme leanness (usually caused by starvation or disease)
Word Usage
"Bratman asserts that “emaciation is common among followers of certain health food diets, such as rawfoodism, and this can at times reach the extremes seen in anorexia nervosa.”"