Entomere :: Entomere (n.) The more granular cells, which finally become internal, in many segmenting ova, as those of mammals..
Mentomeckelian :: Mentomeckelian (a.) Of or pertaining to the chin and lower jaw.
Mentomeckelian :: Mentomeckelian (n.) The bone or cartilage forming the anterior extremity of the lower jaw in some adult animals and the young of others.