A cisgender person is someone who is not transgender and can thus also be referred to as a non-transgender person. It is often shortened to cis, which comes from the Latin prefix "cis-" meaning "on the same side of", making it an antonym of "trans-". Cisgender people have a gender identity that matches the gender or sex they were assigned at birth. Their gender expression or gender presentation may be gender non-conforming, such as a femme man who was assigned male at birth. The term "cisgender" should be used when referring to people's genders instead of inaccurate terms like "bio(logical)", "born", "genetic", "natal", or "real". Not all cisgender people are cisgender heterosexual.