Incisors (from Latin incidere, "to cut") are the front teeth present in most heterodont mammals. They are located in the premaxilla above and on the mandible below. Humans have a total of eight (two on each side, top and bottom). Opossums have 18, whereas armadillos have none.
Incisors are most remarkable in rodents in which their incisors constantly grow throughout their lives and must be worn down by gnawing.
|This article is part of Project Glossary, a All Birds project that aims to write comprehensive articles on each term related to animals.|