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

Time Traveler for pneumatocyst

Time Traveler

The first known use of pneumatocyst was in 1859

See more words from the same year

Dictionary Entries Near pneumatocyst

pneumatize

pneumatocyst

pneumatode

See More Nearby Entries 

Statistics for pneumatocyst

Cite this Entry

“Pneumatocyst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pneumatocyst. Accessed 16 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for pneumatocyst

pneumatocyst

noun
pneu·​ma·​to·​cyst | \ ˈn(y)ü-mət-ō-ˌsist How to pronounce pneumatocyst (audio) , n(y)u̇-ˈmat-ə- \

Medical Definition of pneumatocyst

: a benign, usually asymptomatic, gas-filled lesion found in bone especially of the ilium, sacrum, or spinal vertebra

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
True or False

Test your knowledge - and maybe learn something 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!