Dinornis wani nau'in tsuntsaye ne na batattun tsuntsaye marasa tashi, wanda aka fi sani da moa, wadanda suka kasance a New Zealand. Kalmar "Dinornis" ta samo asali ne daga kalmomin Helenanci "deinos" ma'ana "mummunan" ko "mai tsoro," da "ornis" ma'ana "tsuntsaye." Sunan ya dace saboda waɗannan tsuntsayen suna cikin mafi girma da aka taɓa wanzuwa, tare da wasu nau'ikan tsayi sama da mita 3.6 (ƙafa 12).