polyphagia

noun
poly·​pha·​gia | \ˌpä-lē-ˈfā-j(ē-)ə \

Definition of polyphagia 

: excessive appetite or eating

First Known Use of polyphagia

circa 1693, in the meaning defined above

History and Etymology for polyphagia

Greek polyphagia, from polyphagos

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The first known use of polyphagia was circa 1693

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polyphagia

noun
poly·​pha·​gia | \-ˈfā-j(ē-)ə \

Medical Definition of polyphagia 

: excessive appetite or eating — compare hyperphagia

More from Merriam-Webster on polyphagia

Britannica.com: Encyclopedia article about polyphagia

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