Gynesexual or gynosexual, previously also known as femsexual, is a term with several possible definitions.
First, is the exclusive attraction to woman. This means that straight men, lesbian women, and non-binary people attracted to women can be considered gynesexuals. Another word for this definition is womasexual.
The second possible definition is the attraction to people who present femininely, regardless of their actual gender. Another word for this definition is finsexual.
Thirdly, is the attraction to "female anatomy" regardless of whether that person identifies as female, however this definition is sometimes considered transphobic, as it reduces people to their genitals.
This identity is sometimes referred to as "gynephilia" or "gynophilia," however those terms are outdated. Previously the term was used interchangeably with femsexual, however they have diverged enough that they are now typically considered separate terms.
The masculine equivalent is androsexual. The romantic equivalent is gyneromantic.
Pronunciation
History
The term was possibly made with non-binary or genderqueer people in mind. However, many non-binary people prefer terms like finsexual, venusic, or womasexual to describe this attraction, because gynesexual has no agreed upon definition, which can make it's usage confusing, and it can have unfavorable connotations. The term gnyesexual is commonly used by transphobes as a reason to exclude trans women because they are only attracted to "female anatomy" or "real women". Under this definition, it reduces people to their genitalia, putting cisgender women and pre-surgery trans men in the same group because they have "female anatomy". The prefix gyne- means "woman" or "female," which may imply that one sees "female anatomy" and being a woman as interchangeable.