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The Collaborative International Dictionary
Eudaemonics

Eudemonics \Eu`de*mon"ics\, Eudaemonics \Eu`d[ae]*mon"ics\, n. That part of moral philosophy which treats of happiness; the science of happiness; -- contrasted with aretaics.
--J. Grote.

Wiktionary
eudaemonics

n. That part of ethics that deals with happiness; the science of happiness, contrasted with aretaics.