medical Definition of check ligament
1
: alar ligament 1
2
: either of two expansions of the sheaths of rectus muscles of the eye each of which probably restrains the activity of the muscle with which it is associated:
a
: an expansion of the sheath of the lateral rectus that is attached to the lacrimal bone — called also
lateral check ligament
b
: an expansion of the sheath of the medial rectus that is attached to the zygomatic bone — called also
medial check ligament
