Meniscoessus is a genus of extinct mammal from the Upper Cretaceous Period of what is now North America. It lived toward the end of the "age of the dinosaurs" and was a member of the extinct order Multituberculata. It lies within the suborder Cimolodonta and family Cimolomyidae. The genus Meniscoessus was named by Cope E.D. in 1882. It has also been known under the following names: Cimolomys (partly); Dipriodon (Marsh 1889); Halodon (Marsh 1889); Oracodon (Marsh 1889); Moeniscoessus; Selenacodon (Marsh 1889) (partly); and Tripriodon (Marsh 1889).