Is there some name for a matrix which is unitarily similar to its negative?

Question

I have a code spitting out matrices $A$. I am trying to understand the structure of these matrices.

I have identified that we can always unitarily transform the matrix $A$ to $-A$ via a transform $A'=U^\dagger A U=-A$.

Is there any special name for this type of matrix?

And does this propery imply any others?