sinus

A hollow space in bone or body tissue, especially one near the nose.

• I have a sinus infection.
• The scan showed a blocked sinus near her nose.
• Pressure built up inside the swollen sinuses.

Common phrases: sinus infection, sinus pressure, blocked sinus

Used before another word to describe the heart’s natural control of its beat.

• The monitor showed a normal sinus rhythm.
• The sinus node controls the heart’s regular beat.
• Doctors checked her sinus activity after treatment.

Common phrases: sinus rhythm, sinus node, sinus activity

A space or widened channel in the body that holds or carries blood or lymph.

• Blood flows through the venous sinus.
• The coronary sinus collects blood from the heart.
• The scan showed a clot inside a sinus.

Common phrases: venous sinus, coronary sinus, lymphatic sinus

An unhealthy passage from an infection deep in the body to the skin, through which pus flows.

• Pus drained through a sinus in the skin.
• The surgeon examined the sinus tract.
• Treatment closed the sinus after the infection cleared.

Similar words: draining tract

Common phrases: draining sinus, sinus tract, infected sinus