2. The backward flow of blood through a defective heart or cardiac valve, named for the affected valve, as in aortic regurgitation.
A backward flowing; for example, vomiting is a regurgitation of food from the stomach and a regurgitation of blood back into the heart when a heart valve is incompetent.3. A remastication or re-rumination of food or thoroughly chewing again or repeatedly of food by ruminant or herbivorous animals; such as, cattle, sheep, deer, and camels.
A regurgitation is done by herbivorous animals that have four stomachs, a rumen, reticulum, omasum, and abomasum or true stomach.