| 单词 | speculum |
| 释义 | speculum n. (pl. specula) 1. Surgery an instrument for dilating the cavities of the human body for inspection. 2. a mirror, usu. of polished metal, esp. in a reflecting telescope. 3. Ornithol. a lustrous coloured area on the wing of some birds, esp. ducks. Phrases and idioms speculum-metal an alloy of copper and tin used as a mirror, esp. in a telescope. Etymology: L, = mirror, f. specere look |
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