placoid

placoid

1. any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates

众多的软骨鱼类；以软骨骨架和板状鱼鳞为特征，包括鲨、鳐、灰鳐

2. any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates.

众多的软骨鱼类；以软骨骨架和板状鱼鳞为特征，包括鲨、鳐、灰鳐。

3. stomodeal denticles Special placoid scales lining the mouth and pharyngeal cavities of some Elasmobranchii, e.g. Heterodontus.

口道小齿在一些板鳃亚纲的嘴巴与咽洞里的特化盾鳞，例如虎鲨。

4. Any of numerous fishes of the class Chondrichthyes, characterized by a cartilaginous skeleton and placoid scales and including the sharks, rays, and skates.

属软骨鱼纲的鱼软骨鱼纲鱼的一种，以软骨骨架和板状鱼鳞为特征，包括鲨、鳐、灰鳐

5. acute posterior multifocal placoid pigment epitheliopathy

急性后极部多发性鳞状色素上皮病变, 急性多发性缺血性脉络膜病变

6. acute placoid posterior multifocal pigment epitheliopathy

急性后部多病灶性鳞状色素上皮病变

7. acute multifocal placoid pigment epitheliopathy

急性多病灶鱼鳞板状色素上皮病

8. This is a case of typical acute posterior multifocal placoid pigment epitheliopathy.

摘要本篇提出一个有关网膜色素上皮变性的病例。

9. placoid sensilla

板形感器

10. 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。

11. placoid Plate-like; applied to modified scales in some extinct fishes, and in sharks and rays.

盾形的板状的；适用于一些己灭绝鱼种中变异的鳞片，以及鲨鱼与魟的。

12. placoid scale

盾鳞

13. denticle The tooth-like scale of elasmobranchs; placoid scale of cartilaginous fish; also called dermal denticle.

细鳞板鳃类的像牙齿一样鳞片;软骨鱼的盾鳞;也被称为表皮的细鳞。

14. shagreen Untanned sharkskin retaining the placoid scales;

鲨鱼皮保留盾鳞的未鞣制鲨鱼皮；

15. 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。