cosmoid

1.dentine A hard mesodermal material in teeth and some scales (cosmoid, ganoid and placoid scales) produced by odontobasts.

齿质组成牙齿或某些片(硬盾)中硬质。

2.enamel A shiny hard material covering the dentine of teeth and the surface of some scales (cosmoid and placoid scales).

珐琅有光泽硬质包覆在牙齿及一些片(盾)表面。这是脊椎动所产生最硬质。