Source : Webster's Revised Unabridged Dictionary (1913)

Gynecocracy \Gyn`e*coc"ra*cy\, n. [Gr. ?; gynh`, gynaiko`s, a
   woman + ? to rule: cf. F. gyn['e]cocratie. Cf. {Gynocracy}.]
   Government by a woman, female power; gyneocracy. --Bailey.