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.
(Pro*ject"ment) n. Design; contrivance; projection. [Obs.] Clarendon.
(Pro*ject"or) n. [Cf. F. projeteur.] One who projects a scheme or design; hence, one who
forms fanciful or chimerical schemes. L'Estrange.
(Pro*jec"ture) n. [L. projectura: cf. F. projecture.] A jutting out beyond a surface.
(||Pro`jet") n. [F. See Project, n.] A plan proposed; a draft of a proposed measure; a project.
(Proke) v. i. To poke; to thrust. [Obs.] Holland.
(Pro*lapse") n. [L. prolapsus, fr. prolapsus, p. p. of prolabi to fall forward; pro forward +
labi to glide, fall.] (Med.) The falling down of a part through the orifice with which it is naturally connected,
especially of the uterus or the rectum. Dunglison.
(Pro*lapse"), v. i. To fall down or out; to protrude.
(Pro*lap"sion) n. [L. prolapsio.] (Med.) Prolapse. [ Written also prolaption.] [Obs.]
(Pro*lap"sus) n. [L.] (Med.) Prolapse.
Prolate cycloid. See the Note under Cycloid. Prolate ellipsoid or spheroid (Geom.), a figure
generated by the revolution of an ellipse about its major axis. See Ellipsoid of revolution, under Ellipsoid.
(Pro"late) a. [L. prolatus, used as p. p. of proferre to bring forth, to extend; pro + latus, p.
p. See Pro-, and Tolerate. ] Stretched out; extended; especially, elongated in the direction of a line
joining the poles; as, a prolate spheroid; opposed to oblate.
(Pro*late") v. t. To utter; to pronounce. [Obs.] "Foun-der-ed; prolate it right." B. Jonson.
(Pro*la"tion) n. [L. prolatio: cf. F. prolation.]
1. The act of prolating or pronouncing; utterance; pronunciation. [Obs.] Ray.
2. The act of deferring; delay. [Obs.] Ainsworth.
3. (Mus.) A mediæval method of determining of the proportionate duration of semibreves and minims.
(||Pro*la"tum) n.; pl. Prolata [ NL. See Prolate.] (Geom.) A prolate spheroid. See Ellipsoid
of revolution, under Ellipsoid.
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