Source : Webster's Revised Unabridged Dictionary (1913)

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