Racial hygiene is a term commonly used during the Nazi regime to refer to their racist policies that aimed at maintaining the purity of the Aryan race. For ethical reasons, the term racial hygiene is no longer acceptable in modern language. There are numerous alternative terms that can be used to describe the same concept such as eugenics, racial purification, and ethnic cleansing. However, it is important to note that these terms can also be controversial and are often associated with oppressive ideologies. Therefore, it is crucial to choose language carefully when discussing sensitive issues related to race and ethnicity.