Sinus Asperitatis (Moon)

"Bay of Roughness"

Sinus Asperitatis is an area of lunar mare that extends southward from the Mare Tranquillitatis until it joins the Mare Nectaris to the southeast. In the northern part of this mare is the small crater Torricelli. At the southern end is the prominent crater pair of Theophilus and Cyrillus. (wikipedia entry)

A sinus is a small plain. On the Moon they are named after latin terms describing weather and other abstract concepts.