EMACIATION
bonyness, boniness, emaciation, gauntness, maceration
(noun) extreme leanness (usually caused by starvation or disease)
Source: WordNet® 3.1
Etymology
Noun
emaciation (countable and uncountable, plural emaciations)
The act of making very lean.
The state of being emaciated or reduced to excessive leanness; an excessively lean condition.
Source: Wiktionary
E*ma`ci*a"tion, n. Etym: [Cf. F. Ă©maciation.]
1. The act of making very lean.
2. The state of being emaciated or reduced to excessive leanness; an
excessively lean condition.
Source: Webster’s Unabridged Dictionary 1913 Edition