Politzer's luminous cone -->
pyramid of light
A triangular area at the anterior inferior part of the tympanic membrane, running from the umbo to the periphery, where there is seen a bright reflection of light.
Synonym: cone of light, light reflex, politzer's luminous cone, red reflex, wilde's triangle.
Malacarne's pyramid, a lobule on the undersurface of the cerebellum, the posterior portion of the vermis.