projection (redirected from Map projections)

projection /pro·jec·tion/ (-jek´shun)

1. a throwing forward, especially the reference of impressions made on the sense organs to their proper source, so as to locate correctly the objects producing them.

2. a connection between the cerebral cortex and other parts of the nervous system or organs of special sense.

3. the act of extending or jutting out, or a part that juts out.

4. an unconscious defense mechanism by which a person attributes to someone else unacknowledged ideas, thoughts, feelings, and impulses that they cannot accept as their own.

5. the orientation of a radiographic machine in relation to the body or a body part.

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pro·jec·tion (pr-jkshn)

n.

1. The act of projecting or the condition of being projected.

2. The attribution of one's own attitudes, feelings, or suppositions to others.

3. The attribution of one's own attitudes, feelings, or desires to someone or something as a naive or unconscious defense against anxiety or guilt.

4. The localization of visual impressions to a point in space relative to the person who is doing the viewing: straight ahead, right, left, above, or below.

5. Any of the systems of nerve fibers by which a group of nerve cells discharges its nerve impulses to one or more other cell groups.

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projection,

n orthographic, a projection made on the assumption that the projection lines from the object to the plane of projection are at right angles to the plane.

projection, gnathic planes of orthographic,

n.pl the three planes of projection to which gnathologically mounted casts are oriented: the horizontal, vertical, (frontal), and profile planes. The horizontal plane is the axis-orbital plane. The hinge axis is the line of intersection for both the horizontal and frontal planes. The profile plane is the mechanical midsagittal plane of the articulator.

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projection

throwing forward, e.g. x-ray projection.

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somatotopical projection

an arrangement by which a picture of the body is represented on a surface, such as projection onto the cerebral cortex of the topography of the body from which the efferent nerve impulses depart or to which afferent impulses come.