1. lemming rat a rodent, which "travelling in myriads seawards from the hills," as seen in Norway, "turns not to the right or the left, eats its way through whatever will eat, and climbs over whatever will not eat, and perishes before reaching the sea, its consistent rigidly straight journey, a journey nowhither." See the Application in the "Latter Pamphlet," No. 6.
Definitions of lemming rat
