Sentence:  The 1960's may well be remembered as the <WSD>"epicene</WSD>" era. Boys grew long hair and bangs; girls adopted trousers, vests and peaked caps – and with everyone wearing tight pants and boots, your guess is as good as ours whether that was a guy or a gal who just went by! 
Meaning of the word marked with <WSD> tags:  Of indeterminate sex, whether asexual, androgynous, hermaphrodite, or intersex; of a human face, intermediate in form between a man's face and a woman's face.