What does SINUS mean?

sinus

Part of Speech: Noun

Definition: A cavity or channel in the body, especially one filled with air, that is lined with a mucous membrane and connects to an opening in the body.

Pronunciations: US: /ˈsaɪnəs/; UK: /ˈsʌɪnəs/

Origin and Usage: The word "sinus" comes from the Latin word "sinus," which means "a bend, curve, or fold." In anatomy, it refers to a cavity or channel in the body, especially one filled with air, that is lined with a mucous membrane and connects to an opening in the body. The term "sinus" is commonly used to refer to the paranasal sinuses, which are air-filled spaces in the bones of the skull that are connected to the nasal cavity. Sinusitis is a common condition that occurs when these sinuses become inflamed or infected.

Synonyms: cavity, channel, hollow, recess, socket

Related Words: nasal, mucin, mucus, polyp, septa

Example Sentences:

• He has a sinus infection and needs to see a doctor.
• The paranasal sinuses are located in the bones of the skull.
• Sinusitis can cause symptoms such as facial pain, headache, and congestion.
• The surgeon removed a tumor from her sinus cavity.