Entries linking to sinusitis
"hollow curve or cavity in the body," early 15c., from Medieval Latin sinus, from Latin sinus "bend, fold, curve, a bent surface; a bay, bight, gulf; a fold in land;" also "fold of the toga about the breast," hence "bosom," and figuratively "love, affection, intimacy; interior, inmost part;" of unknown origin.
word-forming element in medicine denoting "diseases characterized by inflammation" (of the specified part), Modern Latin, from Greek -itis, feminine of adjectival suffix -ites "pertaining to." Feminine because it was used with an implied nosos "disease," a feminine noun; especially in arthritis (nosos) "(disease) of the joints." Arthritis (16c.) was one of the earliest appearances of the suffix in English and from it the suffix was abstracted in other uses.
<a href="https://www.etymonline.com/word/sinusitis">Etymology of sinusitis by etymonline</a>
Harper, D. (n.d.). Etymology of sinusitis. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/sinusitis
Harper Douglas, “Etymology of sinusitis,” Online Etymology Dictionary, accessed $(datetime), https://www.etymonline.com/word/sinusitis.
Harper, Douglas. “Etymology of sinusitis.” Online Etymology Dictionary, https://www.etymonline.com/word/sinusitis. Accessed $(datetimeMla).
D. Harper. “Etymology of sinusitis.” Online Etymology Dictionary. https://www.etymonline.com/word/sinusitis (accessed $(datetime)).