Definitions for "Tiselius"
Tiselius is a lunar impact crater that lies just to the east of the Valier crater, on the Moon's far side. The craters Tiselius and Valier are separated by only a few kilometers of intervening terrain. Less than a crater diameter to the east of Tiselius is the smaller, elongated Stein crater, and to the north is the small, eroded Šafařík crater.