lachrymal groove A small grove on the lower edge of the snout just above the upper lip, formed from a fold of skin under the edge of the lachrymal bone.

• 泪骨凹槽在上嘴唇的正上方，吻部下面边缘上的一种小沟，从泪骨边缘下面的皮肤皱摺形成。