psammodont
/ˈ(p)samə(ʊ)dɒnt/Palaeontology
noun
A shark of the extinct family Psammodontidae, known almost entirely from large, rough-surfaced, pavement teeth found in the early Carboniferous of North America and Europe.
adjective
Relating to or characteristic of a psammodont.
Origin
Late 19th century. From psammo- + -odont, after scientific Latin Psammodontidae, family name.