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
Buying Guide
Our Reviews team has selected the best baby bottles.
Test Your Vocabulary
Name That Color
-
- Name that color:

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share baby tooth
Time Traveler for baby tooth
The first known use of baby tooth was in 1834
See more words from the same year