PROJECTION

expulsion, projection, ejection, forcing out

(noun) the act of expelling or projecting or ejecting

protrusion, projection, jut, jutting

(noun) the act of projecting out from something

projection

(noun) any structure that branches out from a central support

projection

(noun) the representation of a figure or solid on a plane as it would look from a particular direction

projection

(noun) a prediction made by extrapolating from past observations

project, projection

(noun) a planned undertaking

projection

(noun) the projection of an image from a film onto a screen

projection, acoustic projection, sound projection

(noun) the acoustic phenomenon that gives sound a penetrating quality; “our ukuleles have been designed to have superior sound and projection”; “a prime ingredient of public speaking is projection of the voice”

projection

(noun) (psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else

projection

(noun) any solid convex shape that juts out from something

Source: WordNet® 3.1

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Etymology

Noun

projection (countable and uncountable, plural projections)

Something which projects, protrudes, juts out, sticks out, or stands out.

The action of projecting or throwing or propelling something.

(archaic) The throwing of materials into a crucible, hence the transmutation of metals.

(archaic) The crisis or decisive point of any process, especially a culinary process.

The display of an image by devices such as movie projector, video projector, overhead projector or slide projector.

A forecast or prognosis obtained by extrapolation

(psychology) A belief or assumption that others have similar thoughts and experiences as oneself

(photography) The image that a translucent object casts onto another object.

(cartography) Any of several systems of intersecting lines that allow the curved surface of the earth to be represented on a flat surface. The set of mathematics used to calculate coordinate positions.

(geometry) An image of an object on a surface of fewer dimensions.

(linear algebra) An idempotent linear transformation which maps vectors from a vector space onto a subspace.

(mathematics) A transformation which extracts a fragment of a mathematical object.

(category theory) A morphism from a categorical product to one of its (two) components.

Synonyms

• (something which sticks out): protuberance

Source: Wiktionary

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Pro*jec"tion, n. Etym: [L. projectio: cf. F. projection.]

1. The act of throwing or shooting forward.

2. A jutting out; also, a part jutting out, as of a building; an extension beyond something else.

3. The act of scheming or planning; also, that which is planned; contrivance; design; plan. Davenant.

4. (Persp.)

Definition: The representation of something; delineation; plan; especially, the representation of any object on a perspective plane, or such a delineation as would result were the chief points of the object thrown forward upon the plane, each in the direction of a line drawn through it from a given point of sight, or central point; as, the projection of a sphere. The several kinds of projection differ according to the assumed point of sight and plane of projection in each.

5. (Geog.)

Definition: Any method of representing the surface of the earth upon a plane. Conical projection, a mode of representing the sphere, the spherical surface being projected upon the surface of a cone tangent to the sphere, the point of sight being at the center of the sphere.

– Cylindric projection, a mode of representing the sphere, the spherical surface being projected upon the surface of a cylinder touching the sphere, the point of sight being at the center of the sphere.

– Globular, Gnomonic, Orthographic, projection,etc. See under Globular, Gnomonic, etc.

– Mercator's projection, a mode of representing the sphere in which the meridians are drawn parallel to each other, and the parallels of latitude are straight lines whose distance from each other increases with their distance from the equator, so that at all places the degrees of latitude and longitude have to each other the same ratio as on the sphere itself.

– Oblique projection, a projection made by parallel lines drawn from every point of a figure and meeting the plane of projection obliquely.

– Polar projection, a projection of the sphere in which the point of sight is at the center, and the plane of projection passes through one of the polar circles.

– Powder of projection (Alchemy.), a certain powder cast into a crucible or other vessel containing prepared metal or other matter which is to be thereby transmuted into gold.

– Projection of a point on a plane (Descriptive Geom.), the foot of a perpendicular to the plane drawn through the point.

– Projection of a straight line of a plane, the straight line of the plane connecting the feet of the perpendiculars let fall from the extremities of the given line.

Syn.

– See Protuberance.

Source: Webster’s Unabridged Dictionary 1913 Edition

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