Word Origin and History for semi-Expand before vowels sem-, word-forming element meaning half, part, partly; partial, imperfect; twice, from Latin semi-half, from PIE *semi-half (cf. Sanskrit sami half, Greek hemi-half, Old English sam-, Gothic sami-half).
Well-known rodents include mice, rats, squirrels, prairie dogs, porcupines, beavers, guinea pigs, hamsters, gerbils and capybaras. Other animals such as rabbits, hares, and pikas, whose incisors also grow continually, were once included with them, but are now considered to be in a separate order, the Lagomorpha.
Animal Info Classification of Animals vertebrates Mammals. Mammals. Mammals are endothermic and are warm blooded animals. Of all the class in the animal world the mammals are considered to be the most advanced and popular class.They are the oldest animals in the world that live from the world of dinosaurs.ammals belong to the class mammalia and are the only class that has hair and feed their young ones with the milk produced by the mammary glands. Dogs and cats that we house are mammals; horse, sheep, baboons, giraffes and elephants are also mammals. We the human beings also belong to the class mammals.