A peculiar phase of the aurora borealis, formed by the
concentration or convergence of luminous beams around the point in the
heavens indicated by the direction of the dipping needle.

A character [/] called the pause or hold.

A peculiar luminous appearance, or aureola, which surrounds
the sun, and which is seen only when the sun is totally eclipsed by the
moon.

A circle, usually colored, seen in peculiar states of the
atmosphere around and close to a luminous body, as the sun or moon.

An inner appendage to a petal or a corolla, often forming a
special cup, as in the daffodil and jonquil.

The shelly skeleton of a sea urchin.

The projecting part of a Classic cornice, the under side of
which is cut with a recess or channel so as to form a drip. See Illust.
of Column.

A crown or garland bestowed among the Romans as a reward
for distinguished services.

The upper surface of some part, as of a tooth or the skull;
a crown.

Any crownlike appendage at the top of an organ.