Common meaning:

A field of knowledge that deals with living organisms. This includes how human biology impacts human behavior.

Hidden meaning of the Equity religion: 

Biology is an illusion because only socialization impacts human behavior.

Discussion:

The Equityists believe that biology is actually an illusion and a trick used by dominant groups to keep the minoritized in line. They know by faith that only socialization impacts human behavior.

The Equity religion hates Biology with an intense passion. Of all the sciences, it is the one that members of the religious cult despise the most. This makes sense, because of all the sciences, it is the one that most clearly demonstrates that the faith of Equity is false. 

One of the core beliefs of Equity is that all human behavior is generated by our socialization in groups and that nothing else has any impact. Biology and genetics clearly show that this is wrong and the Equityists don’t like it. This explains the insistence of the faithful that there is no such thing as a biological male or female even though the genetic evidence is clearly against them.

If we accept the lie that only socialization impacts human behavior and that we can reprogram people to behave differently, the results will be catastrophic. The confusion and pain inflicted on young people will be off the charts.