perimetrium

For example, the serosa of the uterus is called the perimetrium.

The third layer is called the perimetrium.

The perimetrium (or serous coat of uterus) is the outer serosa layer of the uterus, equivalent to peritoneum.

The myometrium is located between the endometrium (the inner layer of the uterine wall), and the serosa or perimetrium (the outer uterine layer).