pat·​u·​lous ˈpa-chə-ləs How to pronounce patulous (audio)
: spreading widely from a center
a tree with patulous branches

Word History


Latin patulus, from patēre to be open — more at fathom

First Known Use

1616, in the meaning defined above

Time Traveler
The first known use of patulous was in 1616

Dictionary Entries Near patulous

Cite this Entry

“Patulous.” Dictionary, Merriam-Webster, Accessed 20 Mar. 2023.

Medical Definition


pat·​u·​lous ˈpach-ə-ləs How to pronounce patulous (audio)
: spread widely apart : wide open or distended
a patulous eustachian tube
patulousness noun
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