sinusitis Hear it!

sinusitis definition

si·nus·itis (sī′nəs īt′is)

noun

inflammation of a sinus or sinuses, esp. those of the skull

Etymology: ModL: see sinus & -itis

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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