Dictionary » P » 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.

4. 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. (Science: geography) 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 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.

(Science: geometry) powder of projection, 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.

Synonym: See protuberance.

Origin: L. Projectio: cf. F. Projection.

Please contribute to this project, if you have more information about this term feel free to edit this page

Results from our forum

Re: Re:

... to how, in the sleeper effect, a viewer's skepticism of a biased source may disappear over time in relation to how persuasive the message i 8.projection,it was i who was accused of being disinformation!,ha! Projection What Is It? This is another classic of RW argumentation -- basically, accuse ...

See entire post
by vincio
Mon Feb 16, 2009 2:18 am
Forum: Molecular Biology
Topic: Important unknown nanotech within humans
Replies: 32
Views: 175619

First ever video footage of ovulation

... hormones to predict when she is about ovulate and when to begin filming, here you can see the ovary end of fallopian tubule covered by finger like projection called fimbria, A mucous plug containing the egg breaks away from the ovary, the fingers move in time with the women's heart beat and become ...

See entire post
by loyolite11
Mon Sep 15, 2008 5:21 am
Forum: Biology Movies
Topic: First ever video footage of ovulation
Replies: 0
Views: 5095

Bird Evolution

... Even reptiles have a decently wide range of scale types. If you think of an early feather being a broad scale whose ridges (there's often a projection of thicker ridges from the central "rod") become actual separate projections, it's not hard to see the progression.

See entire post
by Darby
Mon Jul 28, 2008 5:12 pm
Forum: Evolution
Topic: Bird Evolution
Replies: 9
Views: 10625

Re: Motion of Olfactory Cilia?

... Google Images), the cilia interact with neurons from the olfactory bulb on the olfactory epithelium. The olfactory lobe is farther away, kind of a projection of the brain, and just interacts with the neurons. There are also microvilli on the epithelium probably to aid capture of airborne molecules.

See entire post
by Darby
Mon Jun 02, 2008 7:42 pm
Forum: Human Biology
Topic: Motion of Olfactory Cilia?
Replies: 7
Views: 11418

IBO 2003 questions- please help me out

I found a tool at Expasy http://www.expasy.org/tools/ called ConSurf http://consurf.tau.ac.il/ whose job was "Projection of evolutionary conservation scores of residues on protein structures " running polymerase and histone H1 (the DNA linker in nucleosome model outside ...

See entire post
by tittu
Wed May 14, 2008 3:14 am
Forum: Cell Biology
Topic: IBO 2003 questions- please help me out
Replies: 9
Views: 11202
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 13,578 times. 
What links here | Related changes | Permanent link