The chamber, or one of the two chambers, of the heart, by which the blood is received and transmitted to the ventricle or ventricles; so called from its resemblance to the auricle or external ear of some quadrupeds
A small leaflike structure (often seen as a pair of auricles) that occurs at the base of the new flush of shoot growth, and which may or may not persist throughout the growing season The prime example is the blue-green auricles of Blackhaw