Glossary

This is a list of words and phrases, plus their definitions, that might be useful. Definitions from the More Than Two web site.

Polyamorous
(Literally, poly many + amor love) The state or practice of maintaining multiple sexual and/or romantic relationships simultaneously, with the full knowledge and consent of all the people involved. Polyamorous: of or related to the practice of polyamory, as in polyamorous relationship: a relationship involving more than two people, or open to involvement by more than two people; polyamorous person: a person who prefers or is open to romantic relationships with more than one partner simultaneously.

Unicorn
Colloquial; also known as "hot bi babe". Usage: Almost always used of a hypothetical woman who is willing to date both members of an existing couple, agree not to have any relationships other than the ones with the couple, agree not to be sexually involved with one member of the couple unless the other member of the couple is also there, and/or agree to move in with the couple. So named because people willing to agree to such arrangements are vanishingly rare, whereas couples looking for a woman who will agree to these terms are incredibly common. Having said that, anecdotally, triads seem to be increasingly common.

Triad
A word made by combining "couple" and "triple", or "three". A polyamorous relationship composed of three people. 2. A union or group of three. Usage: In the sense of Def. 1, generally, the word triad is most often applied to a relationship in which each of the three people is sexually and emotionally involved with all the other members of the triad, as may be the case in a triad consisting of one man and two bisexual women or one woman and two bisexual men.