- A subclass of Mammalia, having a cloaca in which
the ducts of the urinary, genital, and alimentary systems terminate, as
in birds. The female lays eggs like a bird. See Duck mole, under Duck,
and Echidna.
- Instrument for holding open a bodily cavity - telescope mirror - of Speculum - A mirror, or looking-glass; especially, a metal mirror,
as in Greek and Roman archaeology. - A reflector of polished metal, especially one used in
reflecting telescopes. See Speculum metal, below. - An instrument for dilating certain passages of the body,
and throwing light within them, thus facilitating examination or
surgical operations. - A bright and lustrous patch of color found on the wings
of ducks and some other birds. It is usually situated on the distal
portions of the secondary quills, and is much more brilliant in the
adult male than in the female.