speculum
/ˈspekjʊləm/noun
(pl. specula /-lə/)
1
- Medicine a metal instrument that is used to dilate an orifice or canal in the body to allow inspection【医】窥器, 张开器。
2
- Ornithology a bright patch of plumage on the wings of certain birds, especially a strip of metallic sheen on the secondary flight feathers of many ducks【鸟】翼斑, 翼镜。
3
- a mirror or reflector of glass or metal, especially (formerly) a metallic mirror in a reflecting telescope金属镜; 反射镜。
3.1
- short for SPECULUM METAL.SPECULUM METAL的简称。
词源
late Middle English: from Latin, literally 'mirror', from specere 'to look'.