Definition, Meaning & Synonyms

sinus

Noun

/ˈsaɪ.nəs/

Definition

A sinus refers to a cavity or hollow space within a bone or other tissues in the body, often associated with the nasal region.

Examples

The maxillary sinus is located in the cheekbone region.
Infection in the sinuses can lead to sinusitis, causing symptoms like headaches and nasal congestion.

Meaning

In medical terminology, sinuses are air-filled spaces located in the skull that are connected to the nasal cavity. They play a role in breathing and help to lighten the weight of the skull.