pneumatocyst

noun
pneu·​ma·​to·​cyst | \ ˈn(y)ü-mə-tō-ˌsist How to pronounce pneumatocyst (audio) , n(y)u̇-ˈma-tə-\

Definition of pneumatocyst

1 : the air bladder of certain algae and aquatic plants … many seaweeds have floats called pneumatocysts, filled with oxygen or carbon dioxide.— Michael Le Page
2 : a benign, usually asymptomatic, gas-filled lesion found in bone especially of the ilium, sacrum, or spinal vertebra

First Known Use of pneumatocyst

1859, in the meaning defined at sense 1

History and Etymology for pneumatocyst

pneumato- + -cyst

Keep scrolling for more

Learn More about pneumatocyst

Share pneumatocyst

Statistics for pneumatocyst

Look-up Popularity

Time Traveler for pneumatocyst

The first known use of pneumatocyst was in 1859

See more words from the same year

Comments on pneumatocyst

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

WORD OF THE DAY

of or relating to a parable or parabola

Get Word of the Day daily email!

Test Your Vocabulary

A Green Quiz

  • shamrock
  • What is the best definition of green-eyed monster?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

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!