sinusitis

[ sahy-nuh-sahy-tis ]
/ ˌsaɪ nəˈsaɪ tɪs /

noun Pathology.

inflammation of a sinus or the sinuses.

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Origin of sinusitis

From New Latin, dating back to 1900–05; see origin at sinus, -itis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for sinusitis

sinusitis
/ (ˌsaɪnəˈsaɪtɪs) /

noun

inflammation of the membrane lining a sinus, esp a nasal sinus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for sinusitis

sinusitis
[ sī′nə-sītĭs ]

n.

Inflammation of the mucous membrane of a sinus, especially of the paranasal sinuses.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.