Sinus example sentences
si·nus
noun
sinus (noun) · sinuses (plural noun)
- a cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities.
- an irregular venous or lymphatic cavity, reservoir, or dilated vessel.
- an infected tract leading from a deep-seated infection and discharging pus to the surface.
- a rounded notch between two lobes on the margin of a leaf or petal.
- relating to or denoting the sinoatrial node of the heart or its function as a pacemaker: