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Like, or allied to, the porcupines; -- said of a group (Hystricomorpha) of rodents.

A genus of rodents, including the porcupine.

The Urodela.

Incapable of being corroded, consumed, or eaten away.

Having the ironwork loose or corroded; -- said of a ship when her bolts and nails are so eaten with rust that she has become leaky.

Any small jumping rodent of the genus Dipus, esp. D. Ægyptius, which is common in Egypt and the adjacent countries. The jerboas have very long hind legs and a long tail. [Written also gerboa.]

causes the seed to roll to roll and jump about. -- Jumping deer (Zoöl.), a South African rodent (Pedetes Caffer), allied to the jerboa. -- Jumping jack, a toy figure of a man, jointed and made to jump or dance by means of strings. -- Jumping louse (Zoöl.), any of the numerous species of plant lice belonging to the f…

A group of rodents, including the hares. They have four incisors in the upper jaw. Called also Duplicidentata.

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.

A small European rodent (Eliomys nitela), allied to the dormouse.

f, on, upon, at, in. When she saw Isaac, she lighted off the camel. Gen. xxiv. 64. Slowly rode across a withered heath, And lighted at a ruined inn. Tennyson.

or all those placental mammals that have a brain with few or no cerebral convolutions, as Rodentia, Insectivora, etc.

e under 2d Log, n., 2. -- Log perch (Zoöl.), an ethiostomoid fish, or darter (Percina caprodes); -- called also hogfish and rockfish. -- Log reel (Naut.), the reel on which the log line is wound. -- Log slate. (Naut.) See Log board (above). -- Rough log (Naut.), a first draught of a record of the cruise or voyage.…

A very singular rodent (Lophiomys Imhausi) of Northeastern Africa. It is the only known representative of a special family (Lophiomyidæ), remarkable for the structure of the skull. It has handlike feet, and the hair is peculiar in structure and arrangement.

Any rodent of the genus Arctomys. The common European marmot (A. marmotta) is about the size of a rabbit, and inhabits the higher regions of the Alps and Pyrenees. The bobac is another European species. The common American species (A. monax) is the woodchuck.

a typical characteristic. It includes the lower orders, as the Insectivora, Cheiroptera, Rodentia, and Edentata.

A South American rodent (Cavia rupestris), allied to the Guinea pig, but larger; -- called also rock cavy.

ealis), are the best known. -- Mole rat (Zoöl.), any one of several species of Old World rodents of the genera Spalax, Georychus, and several allied genera. They are molelike in appearance and habits, and their eyes are small or rudimentary. -- Mole shrew (Zoöl.), any one of several species of short-tailed American s…

onsumes, or wastes any other thing. Moth blight (Zoöl.), any plant louse of the genus Aleurodes, and related genera. They are injurious to various plants. -- Moth gnat (Zoöl.), a dipterous insect of the genus Bychoda, having fringed wings. -- Moth hunter (Zoöl.), the goatsucker. -- Moth miller (Zoöl.), a clothes mot…

Any one of numerous species of small rodents belonging to the genus Mus and various related genera of the family Muridæ. The common house mouse (Mus musculus) is found in nearly all countries. The American white-footed, or deer, mouse (Hesperomys leucopus) sometimes lives in houses. See Dormouse, Meadow mouse, under Me…