appendage(redirected from atrial appendage)
Also found in: Dictionary, Thesaurus, Medical, Legal.
Related to atrial appendage: Right auricle
1. Zoology any organ that projects from the trunk of animals such as arthropods
2. Botany any subsidiary part of a plant, such as a branch or leaf
Any subordinate or nonessential structure associated with a major body part.
Any fitting installed outside the underwater hull proper, such as a rudder, shaft, shaft strut, and bilge keel.
Any jointed, peripheral extension, especially limbs, of arthropod and vertebrate bodies.