speculum
noun
spec·u·lum
ˈspe-kyə-ləm
plural specula
ˈspe-kyə-lə
also speculums
1
: an instrument inserted into a body passage especially to facilitate visual inspection or medication
2
: a drawing or table showing the relative positions of all the planets (as in an astrological nativity)
3
: a patch of color on the secondaries of most ducks and some other birds
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Merriam-Webster unabridged
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