Nominsexual is the attraction to everyone except those who are masculine in nature. "Masculine in nature" includes most men, masculine aligned non-binary people. Depending on the person, it can also include some masculine presenting women, or non-binary people.
Similar terms include femaric, neptunic, and nomasexual.
The feminine equivalent to nominsexual is nofinsexual.
Etymology
"Min" stands for "masculine in nature", so the prefix nomin- stands for no masculine in nature.