If you describe something as androgynous, you are saying that you can't classify it as strictly male or female. If you are looking for an androgynous name, for example, choose Pat.
You can see the meaning of androgynous in its parts: In Greek, andros means "male" and gyn means "female." Someone who is androgynous has both male and female characteristics, and therefore may be mistaken for being a member of the opposite gender. Don't confuse androgynous with unisex, which describes objects or places used by both males and females, like a unisex restroom.