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speculum

spec·u·lum [ spékyələm ] (plural spec·u·la [ spékyələ ] or spec·u·lums)


noun 
Definition:
 
1. optics mirror: a mirror or other reflective surface in an optical instrument such as a telescope

2. medicine medical instrument: a medical instrument used to hold open a body passage such as the anus or vagina so that it can be examined

3. birds colored patch on bird's wings: a patch of color on the wings of ducks and some other birds

[Late 16th century. < Latin, "mirror" < specere "look at"]
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