a shape with a circular base or top and a part that tapers to a point, or an object with this shape
one of two types of cell in the retina of the eye which is sensitive to light, used especially in the perception of bright light and colour.
See also rod
verb
to show a rapid change for the worse in neurological condition due to herniation of the midbrain through the foramen magnum in the skull, caused by raised pressure inside the brain
