wood louse


Definition of wood louse

: a terrestrial isopod crustacean (suborder Oniscoidea) with a flattened elliptical body often capable of being rolled into a ball

called also pill bug, sow bug

First Known Use of wood louse

1611, in the meaning defined above

Keep scrolling for more

Learn More about wood louse

Statistics for wood louse

Look-up Popularity

Time Traveler for wood louse

The first known use of wood louse was in 1611

See more words from the same year

Keep scrolling for more

More Definitions for wood louse

wood louse


English Language Learners Definition of wood louse

: a small, gray insect that lives under stones and in other dark, wet places

wood louse


Kids Definition of wood louse

: a tiny flat gray animal that is a crustacean usually found living under stones or bark

More from Merriam-Webster on wood louse

Rhyming Dictionary: Words that rhyme with wood louse

Comments on wood louse

What made you want to look up wood louse? Please tell us where you read or heard it (including the quote, if possible).


to be made up of

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!