LEMMINGS
Noun
lemmings
plural of lemming
Source: Wiktionary
LEMMING
Lem"ming, n. Etym: [Nor. lemming, lemende; cf. Sw. lemel, Lapp.
lummik.] (Zoöl.)
Definition: 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 Edition