pneu·​mat·​o·​phore | \ nu̇-ˈma-tə-ˌfȯr How to pronounce pneumatophore (audio) , nyu̇- \

Definition of pneumatophore

1 : a muscular gas-containing sac that serves as a float on a siphonophore colony
2 : a usually partially exposed root of a wetland plant (such as a mangrove) that functions especially in the intake of oxygen from the atmosphere

Examples of pneumatophore in a Sentence

Recent Examples on the Web The arrangement of these pneumatophores can help scientists tell pterosaur species apart. Michael Greshko, National Geographic, "New 'frozen dragon' pterosaur found hiding in plain sight," 10 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pneumatophore.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pneumatophore

1859, in the meaning defined at sense 1

History and Etymology for pneumatophore

International Scientific Vocabulary

Keep scrolling for more

Learn More about pneumatophore

Time Traveler for pneumatophore

Time Traveler

The first known use of pneumatophore was in 1859

See more words from the same year

Statistics for pneumatophore

Last Updated

8 Dec 2019

Cite this Entry

“Pneumatophore.” The Dictionary, Merriam-Webster Inc., Accessed 18 January 2020.

Comments on pneumatophore

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


experienced by way of someone else

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens painting
  • Which is the best synonym of bowdlerize?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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!