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.
cattle, sheep, goats, and relatives. The mammal family Bovidae includes a wide variety of hoofed mammals, including antelopes, cattle, sheep, goats, and others . This family is found throughout much of the world, except for Australia and many islands, but most species are found in Africa (antelope, gazelles, buffalo, wildebeest, etc.). There are about 137 species in the world. Some of the most important animals in human history and agriculture are members of this family, including cows, sheep, and goats. In North America there are a few native members of the family Bovidae, including American bison, mountain goats, muskoxen, bighorn sheep, and Dallâs sheep.