The term GENUS RODENT can be broken down into two parts: the genus and the rodent. The genus is a taxonomic rank used in the classification of living and fossil organisms, and the rodent is a mammal that is characterized by long incisors that continuously grow and must be kept short by gnawing. The crossword solutions for the term GENUS RODENT are MUS, which is a genus of rodents in the family Muridae. This genus includes species such as the house mouse, the field mouse, and the wood mouse.