Sinuses:

1) pockets within bone containing air or sometimes blood. The skull has frontal, maxillary, sphenoid, and ethmoid sinuses.

2) in Southern vernacular, “sinuses” is a condition encompassing everything from nasal congestion, headaches, seasonal allergies, sinusitis, or a viral URI.

3) not an acceptable diagnosis

Patient: “Oh I’m not contagious. I just got sinuses.”