Definition of baby tooth
: a temporary tooth of a young mammal that in human dentition includes four incisors, two canines, and four molars in each jaw : milk tooth, deciduous tooth
- If one of my sisters or brothers or I lost a baby tooth, we always put it in an envelope under our pillow.
- —Ian Frazier
- By the time a dog is about a year old, the baby teeth will have been gradually replaced by 42 permanent teeth …
- —Tom Ewing
