|—n , pl -la, -lums|
|1.||a mirror, esp one made of polished metal for use in a telescope, etc|
|2.||med an instrument for dilating a bodily cavity or passage to permit examination of its interior|
|3.||a patch of distinctive colour on the wing of a bird, esp in certain ducks|
|[C16: from Latin: mirror, from specere to look at]|
speculum spec·u·lum (spěk'yə-ləm)
n. pl. spec·u·lums or spec·u·la (-lə)
A mirror or polished metal plate that is used as a reflector in optical instruments.
An instrument that is used to dilate the opening of a body cavity for medical examination.