Definition: A genus of the family RETROVIRIDAE consisting of viruses with either type B or type D morphology. This includes a few exogenous, vertically transmitted and endogenous viruses of mice (type B) and some primate and sheep viruses (type D). MAMMARY TUMOR VIRUS, MOUSE is the type species.
Other names Type D Retrovirus; Type D Oncovirus; Type D Oncornavirus; Type B, Oncoviruses; Type B Oncovirus; Retrovirus, Type D; Oncoviruses, Type B; Oncovirus, Type D; Oncovirus, Type B; Oncornaviruses, Type D; Oncornavirus, Type D; Betaretroviruses; Type D Oncoviruses; Type D Oncornaviruses; Type B Oncoviruses, Mammalian; Type B Oncoviruses; Retroviruses, Type D; Oncoviruses, Type D; Oncoviruses Type B, Mammalian; Oncoviruses Type B