Of or regarding an atrium
- of or concerning a cavity or chamber within the body (especially one of the top chambers for the heart)
- Of or with respect to an atrium.
regarding the atria, the upper chambers associated with the heart, as with atrial fibrillation and atrial septal problem.
by 1860 in health good sense, from atrium + -al (1).
(a.) Of or related to an atrium.
The pharynx projects freely into the atrium; it is surrounded at the sides and below by the continuous atrial cavity, but dorsally it is held in position in two ways.