a. (Anat.) Pertaining to, or discovered by, J. F. Meckel, a German anatomist. [ 1913 Webster ]

Meckelian cartilage, the cartilaginous rod which forms the axis of the mandible; -- called also Meckel's cartilage. [ 1913 Webster ]

a. [ 1st mental + Meckelian. ] (Anat.) Of or pertaining to the chin and lower jaw. -- n. The bone or cartilage forming the anterior extremity of the lower jaw in some adult animals and the young of others. [ 1913 Webster ]