Final answer:
The term for an individual with ambiguous sex characteristics not defined as male or female is intersex. Intersex conditions can be due to chromosomal, hormonal, or anatomical differences, and are part of a broader understanding of gender diversity beyond the traditional binary.
Step-by-step explanation:
The term that describes an individual with ambiguous sex characteristics that are not clearly defined as male or female is intersex. Intersex is a general term that encompasses a variety of conditions where a person's reproductive or sexual anatomy doesn't fit into the typical definitions of female or male. This can be due to a number of factors, including but not limited to chromosomal differences such as XO or XXY, varying levels of hormones, or differences in reproductive anatomy. Some intersex traits are apparent at birth, while others may not become evident until puberty or later. It's important to understand that gender identity is separate from one's physical sex characteristics, with transgender individuals having a gender identity that differs from their sex assigned at birth. Moreover, many cultures recognize forms of gender expression beyond the binary through multiple gender systems and variant gender identities.