单词cosmoid
网络: 具有齿鳞质的
enamel A shiny hard material covering the dentine of teeth and the surface of some scales ( cosmoid and placoid scales).
珐琅有光泽的坚硬物质包覆在牙齿及一些鳞片（圆鳞与盾鳞）表面。这是脊椎动物所产生最坚硬的物质。
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鳞片（硬鳞与盾鳞）中层的坚硬物质。