Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: any of an order (Trichoptera) of insects with four membranous usually hairy wings, vestigial mouthparts, slender many-jointed antennae, and aquatic larvae — compare caddisworm
1735, in the meaning defined above
Keep scrolling for more
Share caddis fly
Resources for caddis fly
Time Traveler for caddis fly
See more words from the same year
More Definitions for caddis fly
: an insect that has four wings and a larva which lives in water in a silk case covered especially with bits of wood, gravel, sand, or plant matter
More from Merriam-Webster on caddis fly
See words that rhyme with caddis fly
Comments on caddis fly
What made you want to look up caddis fly? Please tell us where you read or heard it (including the quote, if possible).
by word of mouth
Get Word of the Day daily email!
Name that Food Quiz
Test your visual vocabulary with our 10-question challenge!
Test Your Knowledge - and learn some interesting things along the way.
Red Cross Warns of Shelter Conditions
RIP Burt Reynolds
NYT Publishes Anonymous Piece
Kavanaugh Mentions Word in Hearing
Manafort Guilty on 8 Counts
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Words from the week of 9/14/2018
For frog-tossing, sword dancing, & more
That dessert might kill you
How a folk song became a term of derision.
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Test your knowledge of food and food words.
A quiz in common time.
SCRABBLE® fans, sharpen your skills!