Webster's Revised Unabridged Dictionary · 1913

anorexia

anorexia (an`o*reks"i*ȧ) , noun

[Greek 'anorexi`a; 'an priv. + 'o`rexis desire, appetite, 'ore`gein desire.]

(Medicine) Loss of appetite for food. — Coxe

Also: anorexy