medical Definition of annular ligament
: a ringlike ligament or band of fibrous tissue encircling a part:
a
: any of the transverse bands holding in place the extensor and flexor tendons of the wrist and ankle
b
: a strong band of fibers surrounding the head of the radius and retaining it in the radial notch of the ulna — called also
orbicular ligament
c
: any of several strengthening bands of the tendon sheaths of the digits
d
: a ring attaching the base of the stapes to the oval window
