I see over at the PolyPerc page it says of "biamory":
"biamory (abstract noun: love for two) = falling in love with two (but only those two) persons."
It is worth noting here that some folks use "biamorous" to mean "romantically attracted to persons of either sex".
This term arose because "bisexual" turns out to lack nuance and specificity. That is, many self-describing 'bisexuals'
are only interested in sex (not romance) with persons of the same (or "opposite") sex. A biamorous person is
romantically interested in either or both sexes.