emaciation
ɪˌmeɪsɪˈeɪʃ(ə)n
noun
the state of being abnormally thin or weak.
thin to the point of emaciation
thinness,boniness,scrawniness,skinniness,scragginess,starvation,underfeeding,undernourishment,cadaverousness,gauntness,haggardness,attenuation,atrophy,anorexia,phthisis