cisgender (often abbreviated to simply cis) is a term for people whose gender identity matches the sex that they were assigned at birth
having a gender identity or performing in a gender role that society considers appropriate for one’s sex
originated as a way to shift the focus off of a marginalized group, by defining not only the minority group but also the majority
Some transgender people hope that the use of the word cisgender will increase mainstream acceptance and eventually remove the taboos.
Others point out that the term heterosexual is very widely used but seems to have done little for the gay rights movement.
However, prior to 1995, there was no standard word used to describe non-transgender people without the use of negative prefixes while still avoiding terms like “normal”, “born” or “genetic” (women or men).