A second Harmonia, a nymph, mated with Ares, and together they are the parents of the entire race of the Amazons. She is a very minor character in Greek mythology, and very little is written of her, other than to record her name.
Against all expectations, a harmonia is also a type of suture (an immovable joint) in which two bones are joined along a flat (or nearly flat) plane. The bones come firmly together with no overlap, and the apposing bones are usually smooth-surfaced. The lacrimomaxillary suture is a good example.
It is sometimes called a sutura plana or, most commonly, a plane suture.