Cis comes from chemistry, which in Latin means "same side", referring to functional groups of a molecule. It's the opposite of a trans molecule so that's why they appropriated "cis" to refer to normal people. Even though in chemistry cis/trans is like left/right and either way is still normal.
Cis comes from chemistry, which in Latin means "same side", referring to functional groups of a molecule. It's the opposite of a trans molecule so that's why they appropriated "cis" to refer to normal people. Even though in chemistry cis/trans is like left/right and either way is still normal.