(n) excessive development of the breasts in males; usually the result of hormonal imbalance or treatment with certain drugs (including some antihypertensives)
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ Gr. gynaikokrati`a; gynh`, gynaiko`s, a woman + kratei^n to rule: cf. F. gynécocratie. Cf. Gynocracy. ] Government by a woman, female power; gyneocracy. Bailey. [ 1913 Webster ]