adult·oid | \ ə-ˈdəl-ˌtȯid \
plural -s
Definition of adultoid
biology
: an immature individual that resembles an adult
Keep scrolling for more
Test Your Vocabulary
Slippery Words Quiz—Changing with the Times
- What is an earlier meaning of nice?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share adultoid
Time Traveler for adultoid
The first known use of adultoid was in 1946
See more words from the same year