dorsal
1. dor.sal \'do.r-s*l\ \-s*-le-\ aj [LL dorsalis, fr. L dorsum back] 1: relating to or situated near or on the back esp. of an animal or of one of its parts 2: ABAXIAL - dor.sal.ly av 2. dorsal n : a dorsally located part; esp : a thoracic vertebra