Sinusitis
noun, Pathology.
1.
inflammation of a sinus or the sinuses.
noun
1.
inflammation of the membrane lining a sinus, esp a nasal sinus
sinusitis si·nus·i·tis (sī’nə-sī’tĭs)
n.
Inflammation of the mucous membrane of a sinus, especially of the paranasal sinuses.
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