/ ˌænəˈreksiə; NAmE / (also an·or·exia ner·vosa / ˌænəˌreksiə nɜːˈvəʊsə; NAmE nɜːrˈvoʊsə/) noun
[ U ] an emotional disorder , especially affecting young women, in which there is an abnormal fear of being fat, causing the person to stop eating, leading to dangerous weight loss
—compare bulimia
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WORD ORIGIN
late 16th cent.: via late Latin from Greek , from an- without + orexis appetite.