Etymology
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sinusitis (n.)

"inflammation of the sinuses," 1896; see sinus + -itis "inflammation."

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Definitions of sinusitis

sinusitis (n.)
inflammation of one of the paranasal sinuses;
From wordnet.princeton.edu

Dictionary entries near sinusitis

sinsemilla

sinter

sinuate

sinuous

sinus

sinusitis

sinusoid

Siouan

Sioux

sip

siphon