(Not to be confused with neptunian.)
Neptunic is the attraction to women, and non-binary people. It is the attraction to all people except men and masculine-aligned non-binarys. This orientation is mostly used by non-binary people to describe their attraction without relying on the gender binary. The term can be used as a sexuality on it's own or can be combined with other orientations.
Similar terms include nomasexual, femaric, feminamoric/trixic, lunaric, and venusic.
The masculine equivalent to neptunic is uranic, the non-binary equivalent is saturnic.
History
The term neptunic was coined by Tumblr user Socialjusticeichigo on August 31, 2017[1]. They also created the neptunic flag on September 17, 2017[2].