1. rodentia - Noun
2. rodentia - Adjective
An order of mammals having two (rarely four) large incisor teeth in each jaw, distant from the molar teeth. The rats, squirrels, rabbits, marmots, and beavers belong to this order.
Source: Webster's dictionaryLagomorphs differ from rodents in that the former have four incisors in the upper jaw (not two, as in the Rodentia) and have enamel on the front and back side of the incisors, whereas rodents only have enamel on the front side. Source: Internet
The combination of this clade with the clade Glires (composed of Rodentia and Lagomorpha ) forms the clade Euarchontoglires. Source: Internet
The rodent clade corresponds to the order Rodentia, and insects to the class Insecta. Source: Internet