Parallelogram: a quadrilateral with two pairs of parallel sides. Equivalent conditions are that opposite sides are of equal length; that opposite angles are equal; or that the diagonals bisect each other.

The scientific study of dreams is called oneirology. Dreams mainly occur in the rapid-eye movement ( REM) stage of sleep—when brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep.

December 2012) ( Learn how and when to remove this template message) In Freudian dream analysis, content is both the manifest and latent content in a dream, that is, the dream itself as it is remembered, and the hidden meaning of the dream.

Even though the term "lucid" means clear, lucid dreaming is more than just having a clear dream. To have a lucid dream you must know that it's a dream while you're dreaming. That's it. It doesn't require that you can control anything in your dream, though control is what beginning lucid dreamers often aim at.

Dream interpretation is the process of assigning meaning to dreams. In many ancient societies, such as those of Egypt and Greece, dreaming was considered a supernatural communication or a means of divine intervention, whose message could be interpreted by people with these associated spiritual powers.

False awakening. ... False awakenings, mainly those in which one dreams that they have awoken from a sleep that featured dreams, take on aspects of a double dream or a dream within a dream.

Cremello: A horse with a chestnut base coat and two cream genes that wash out almost all color until the horse is a pale cream or light tan color. Often called "white", they are not truly white horses, and they do not carry the white ( W) gene.

I looked, and behold, an ashen horse; and he who sat on it had the name Death; and Hades was following with him. Authority was given to them over a fourth of the earth, to kill with sword and with famine and with pestilence and by the wild beasts of the earth.