pachyodont
/ˈpakɪə(ʊ)ˌdɒnt/Zoology and Palaeontology
adjective
Having thick or massive teeth; specifically of, relating to, or designating (the dentition of) a bivalve mollusc characterized by one to three heavy, blunt teeth in the hinge of the shell, as typical of the extinct rudists (sometimes classified in an order Pachyodonta).
noun
A pachyodont bivalve mollusc. rare.
Origin
Late 19th century; earliest use found in The Century Dictionary. From pachy- + -odont.