The outer ear or pinna.
Synonym of atrium.
An anterior ear-shaped appendage of the left or right atrium of the human heart.
Any appendage in the shape of an ear or earlobe.
A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).
A bay of the sea; a recess in the shore.
An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
Synonym of sine.
An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
Relating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat.