variants:
or less commonly arrowworm \ ˈer-ō-ˌwərm 
, ˈer-ə- , ˈa-rō- , ˈa-rə- \
, ˈer-ə- , ˈa-rō- , ˈa-rə- \Definition of arrow worm
: any of a phylum (Chaetognatha) of small planktonic wormlike marine organisms having curved bristles on either side of the head for seizing prey
Keep scrolling for more
Comments on arrow worm
What made you want to look up arrow worm? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Words of Snow and Ice Quiz
- Which of the following refers to thin, bending ice, or to the act of running over such ice?
Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
Anagram puzzles meet word search.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- Words of Snow and Ice Quiz
A selection of words from the chillier parts of t...
Take the quiz - Name that Thing: Toys and Games Edition
It's all fun and games until someone beats your h...
Take the quiz - True or False?
Test your knowledge - and maybe learn something a...
Take the quiz - SCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share arrow worm
Time Traveler for arrow worm
The first known use of arrow worm was in 1859
See more words from the same year