Omni-Lesbian is a word that combines the prefix omni- with the word lesbian. This term is used for when one is omnisexual, but prioritizes their attraction to women, identifies more with being sapphic/lesbian, or has a preference for women and women-aligned people. It may also mean one experiences split-attraction: being lesbian as well as omniromantic, omnisexual, omni(queer)platonic, or otherwise fits the omni- label in some form.
This term is similar to pan-lesbian, bi-lesbian, and poly-lesbian. This group can be labelled as m-spec lesbians, or lesbians on the multi-attraction spectrum.