trisexual

Adjective

 * 1) Having, or pertaining to a system which involves, three sexes.

Noun

 * 1) An organism (that is, a species) which has three sexes.

Etymology 2
, respelled as if using and as if analogous to.

Adjective

 * 1)  Of a person, willing to "try anything" sexually.
 * 2) * 1944(?), Louis Paul, A Passion for Privacy:
 * "I was told he's trisexual." "Quit it!" Alice laughed. "There's no such thing as trisexual." "I guess you don't read the new books, dearie. That's someone who'll try anything." Alice held her nose.

Noun

 * 1) One who is trisexual.