inferior labial artery: an artery that is a branch of the facial artery that supplies the lower lip
labial artery: an artery that is a branch of the facial artery that supplies the lips of the mouth
thulium: a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime