Lacus Temporis is a small lunar mare that is located in the northeastern quadrant 's near side. This small mare is composed of two large, roughly circular patches of smooth surface, with a pair of small, cup-shaped craters located prominently at their intersection. Both of these regions of basaltic lava covered surface have some smaller side lobes, which are most likely impact features that have become flooded. (wikipedia entry)
A lacus is a "lake" or small plain. On the Moon they are named after latin terms describing weather and other abstract concepts.