speculum

1. 1.

   A medical instrument used during an examination to dilate an orifice.

   检查时用于扩张孔口的医疗器械。

2. 2.

   A mirror, especially one used in a telescope.

   镜子,尤指望远镜中使用的反射镜。

3. 3.

   A bright, lustrous patch of colour found on the wings of ducks and some other birds, usually situated on the distal portions of the secondary quills, and much more brilliant in the adult male than in the female.

   鸭类等鸟类翅膀上明亮光泽的色斑,位于次级飞羽远端,雄鸟比雌鸟更鲜艳。

4. 4.

   A lookout place.

   瞭望处；观察所。

镜子,尤指望远镜中使用的反射镜。；鸭类等鸟类翅膀上明亮光泽的色斑,位于次级飞羽远端,雄鸟比雌鸟更鲜艳。；瞭望处；观察所。；金属镜；反射镜

Connections

Learner notes