define annular ligament
annular ligament. A circular ligament, esp. one enclosing a head or radius or one holding the footplate of the stapes in the oval window.See also: ligament. 1  Facebook.nnular ligament. A circular ligament, esp. one enclosing a head or radius or one holding the footplate of the stapes in the oval window. See also: ligament. 1  Facebook.