speculum

n. mirror or reflective surface in optical instruments; medical instrument used to dilate bodily orifices (Medicine); colorful or iridescent patch on the wings of certain birds

Meanings of speculum include:Speculum (medical), a medical tool used for examining body cavities.A small metal mirror used for telescopes.A hand-held bronze mirror used by Etruscan women.speculum feathers, the secondary feathers on the inner part of a duck's wing which are often brightly coloured.Speculum (journal), a journal of medieval studies published by the Medieval Academy of America.Speculum metal, an alloy containing copper and tin.Ophrys speculum, a species of ground orchid.
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Speculum /spec·u·lum/ pl. spec´ula [L.] an instrument for opening or distending a body orifice or cavity to permit visual inspection. spec·u·lum n. [more]Speculum - Community and Resources

Noun
1. a mirror (especially one made of polished metal) for use in an optical instrument
(hypernym) mirror
2. a medical instrument for dilating a bodily passage or cavity in order to examine the interior
(hypernym) medical instrument

n. speculum, mirror or reflective surface in optical instruments; medical instrument used to dilate bodily orifices (Medicine); colorful or iridescent patch on the wings of certain birds