Definition of fall armyworm
: a migratory American noctuid moth (Spodoptera frugiperda) that is destructive to grains and grasses as a larva
Test Your Vocabulary
Words Named After People
-
- Namesake of the leotard, Jules Léotard had what profession?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share fall armyworm
Time Traveler for fall armyworm
The first known use of fall armyworm was in 1881
See more words from the same year