Lemming
Pronunciation : Lem"ming
Part of Speech : n.
Etymology : [Nor. lemming, lemende; cf. Sw. lemel, Lapp. lummik.] (Zo?l.)
Definition : Defn: Any one of several species of small arctic rodents of the genera Myodes and Cuniculus, resembling the meadow mice in form. They are found in both hemispheres.
Note: The common Northern European lemming (Myodes lemmus) is remarkable for making occasional devastating migrations in enormous numbers from the mountains into the lowlands.
Source : Webster's Unabridged Dictionary, 1913