two-sided

Having two sides, bilateral.

Reversible.

A reversible coat is two-sided and would allow you to change your appearance.

This output control line is used to select which side of a two-sided floppy disk is to be used for reading or writing.

Whose salient properties apply when (the specified object) appears on either side of a given binary operator.

two-sided inverse — two-sided identity

Having two aspects or viewpoints.

That is necessarily or absolutely different than the respective coordinate alethic or temporal modality as well as its opposite.