het·er·oi·cous \-|rȯikəs\adjective alsohet·er·oe·cious\-|rēshəs\ Etymology:heter- + -oicous, -oecious (from Greek oikos dwelling + English -ous) — more at vicinity : having archegonia and antheridia either on the same branch or on different branches of the same plant — compare paroicous, polyoicous