Meaning & Definition of word "Sinus"
Sinus
/ˈsaɪ.nəs/
noun:
- 1. A cavity or recess, especially in the bones of the skull or the tissues of the body, often filled with air or fluid.
- Example: The maxillary sinus is located in the cheek area and is one of the largest sinus cavities.
- 2. Any of the paired cavities within the bones of the face and skull that are connected to the nasal cavity.
- Example: Sinus infections often occur when the nasal passages become blocked, leading to inflammation of the sinus cavities.
- 3. A channel or groove that carries blood in the heart or other organs.
- Example: The venous sinus collects blood from the brain and drains it into the internal jugular vein.
- 4. A fold or recess in the tissue of an organ.
- Example: The sinus of the heart allows blood to flow from the atria into the ventricles.
- 5. A sinusoidal curve or a mathematical function related to sinusoidal waveforms.
- Example: The sinus function in trigonometry is essential for understanding periodic phenomena.
Etymology
●Latin 'sinus', meaning 'bay' or 'fold'.
Common Phrases and Expressions
sinus infection:
An infection that occurs in the sinus cavities, often causing pain and congestion.
maxillary sinus:
The largest of the paranasal sinuses, located in the maxillary bones.
frontal sinus:
A paired sinus located above the eyes within the frontal bone.
Related Words
sinusitis:
Inflammation of the sinus cavities.
sinogram:
A representation of the sinuses in X-ray imaging.