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