book lung

noun

Definition of book lung

: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book

First Known Use of book lung

1881

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Medical Dictionary

book lung

noun \ ˈbu̇k- \

medical Definition of book lung

: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book

Learn More about book lung


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

to pay off by making regular payments

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Add Diction

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

TAKE THE QUIZ

Love words? Need even more definitions?

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