pneumatocyst

noun

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

Word History

Etymology

pneumato- + -cyst

First Known Use

1859, in the meaning defined at sense 1

Time Traveler
The first known use of pneumatocyst was in 1859

Dictionary Entries Near pneumatocyst

Cite this Entry

“Pneumatocyst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pneumatocyst. Accessed 7 Feb. 2023.

Medical Definition

pneumatocyst

noun
pneu·​ma·​to·​cyst ˈn(y)ü-mət-ō-ˌsist How to pronounce pneumatocyst (audio)
n(y)u̇-ˈmat-ə-
: a benign, usually asymptomatic, gas-filled lesion found in bone especially of the ilium, sacrum, or spinal vertebra
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