(film) A cinematic technique in which live action is filmed in front of a screen on which the background action or a background scene is projected. / tomographic reconstruction

A proof of concept; an initial prototype.

(geometry) A plane in which any pair of distinct points determine a line and any pair of distinct lines intersect at a point.

Synonym of back projection

(uncountable, parapsychology) The ability to deliberately detach one's mind, or a ghost-like replica of one's body (one's astral body), from one's physical body and to send it to distant places or into alternate realities or into people's dreams.

A two-dimensional representation of a three-dimensional organic molecule by projection, used mainly in organic chemistry and biochemistry.

plural of Fischer projection

A kind of three-dimensional projection used to represent the cyclic structure of monosaccharides.

A kind of equal-area map projection, intended as an alternative to the Bonne projection that would reduce the extent of extreme distortion at the edges and give a more satisfying overall shape.

A pseudoconic cordiform equal-area map projection that is a limiting form of the Bonne projection, having its standard parallel at one of the poles (90°N/S).