Sapphomoric is a term used by longsword lesbians - exclusionary lesbians/trixamorics who are explicitly and pointedly against multisexual spectrum lesbians. A similar term is Vixenamoric.
The term is focused on the exclusion of bi lesbians, though non-binary lesbians are apparently "free to use it if they want to".
It was coined by @wiccanfemme on Instagram because “bisexuals have invaded the Lesbian label and changed it to include men”.[1]
The non-problematic alternative is Trixamoric. The similar gay male counterpart is Todamoric.