Polysexuality, also spelled plysexual or polisexual is the sexual attraction to many, but not all, genders. The romantic equivalent to polysexual is polyromantic. For example, a polysexual person could be attracted to all genders except men, or be attracted to exclusively non-binary people, genderfluid people and man-aligned people. Polysexuality implies that you would be attracted to more then 2 genders. This can be anything up to all genders besides one.
Polysexuality should not be confused with polyamory, the capacity to be in a relationship with multiple people at once, nor should it be confused with being bisexual or pansexual. The difference between being polysexual and being pan is that pansexuals experience attraction to all genders, while polysexuals are attracted to certain genders, not all. The difference between being polysexual and being bi is that bisexuals are attracted to, at minimum, two genders, usually men and women, while polysexuals are attracted to many genders.
Flag
The polysexual flag has three stripes, pink representing attraction to women, green representing attraction to non-binary people, and blue representing attraction to men.
The flag was created by user Samlin on Tumblr[1] in 2012. They posted a design to the blog @fuckyeahpolysexuality with the caption, "I, as a poly individual, was greatly saddened that we don't have a flag...so I made one :P I made it similar to the bi and pan flags, since they're all in under the multisexual umbrella -Samlin".
The flag has since been recognizable in the LGBT+ community as a symbol of polysexuality.
Etymology
The prefix poly- comes from the Greek prefix polus, meaning 'many'.[2]