Rodentia

Part of speech: noun

Definitions

1. A diverse order of mammals characterized by enlarged front teeth adapted for gnawing, which includes rats, mice, squirrels, and beavers
2. An order of mammals primarily distinguished by their continuously growing incisors in both the upper and lower jaws, commonly known for their burrowing habits
3. A group of small to medium-sized mammals, often recognized for their distinctive dental structure and typically found in a variety of habitats across the world

Etymology: "Rodentia" is the plural of the Latin "rodens," the present participle of "rodere," meaning "to gnaw." Naturalists chose a label that points straight at the animals' most defining feature, a pair of incisors that grow continuously and wear down through chewing. As a scientific group name, it means roughly "the gnawing ones." The same Latin verb lies behind English words for slow wearing away. "Erode" comes from "erodere," to gnaw away, and "corrode" from "corrodere," to gnaw to pieces. "Rodent" itself was borrowed into English from that same participle, so the animals and these verbs share one biting root.

Synonyms: rodents