Definition of threonine
: a colorless crystalline essential amino acid C4H9NO3
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share threonine
Time Traveler for threonine
The first known use of threonine was in 1936
See more words from the same year