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Noun(1) a mirror (especially one made of polished metal(2) a medical instrument for dilating a bodily passage or cavity in order to examine the interior(3) a mirror (especially one made of polished metal) for use in an optical instrument(4) a medical instrument for dilating a bodily passage or cavity in order to examine the interior [also: specula (pl)]

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(1) Both sexes have orange feet and a blue speculum , or wing-patch, bordered in white on two sides, best seen in flight.(2) Females with unpatterned dark bills, an overall dark brown body colour, and a violet speculum with only the trailing edge with white were considered American Black Ducks.(3) A headlamp or head mirror and a nasal speculum should be used for optimal visualization.(4) The latter is important because dabbling ducks have a coloured area in the wing called the speculum .(5) Both sexes have a black and white wing-patch, or speculum , that is distinctive in flight.(6) If light u2018sees,u2019 then the speculum which reflects this seeing light can analogically participate in the solar vision that it reflects; it can derive from it its own vision.(7) This work of light allows us to see the shapes of the world reflected on the optical speculum .(8) The surgeon uses a wire speculum to retract the eyelids to expose the eyeball.(9) With the headlight and speculum the external auditory canal is inspected and cleared of any obstructing wax or debris.(10) Using a nasal speculum , your doctor may look inside your nose for signs of allergic disease such as increased nasal secretions, swelling or polyps.(11) He made his mirrors from speculum metal - four parts copper to one part tin - but had to construct a forge to melt the speculum and cast the disc from which the mirror could be ground.(12) Your eyelids will be opened up using a small instrument called a speculum .(13) An instrument called a speculum , the same as used for a smear test, is sometimes used.