Definition of APLAN. Meaning of APLAN. Synonyms of APLAN

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Definition of APLAN

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Aplanatic focus
Focus Fo"cus, n.; pl. E. Focuses, L. Foci. [L. focus hearth, fireplace; perh. akin to E. bake. Cf. Curfew, Fuel, Fusil the firearm.] 1. (Opt.) A point in which the rays of light meet, after being reflected or refrcted, and at which the image is formed; as, the focus of a lens or mirror. 2. (Geom.) A point so related to a conic section and certain straight line called the directrix that the ratio of the distace between any point of the curve and the focus to the distance of the same point from the directrix is constant. Note: Thus, in the ellipse FGHKLM, A is the focus and CD the directrix, when the ratios FA:FE, GA:GD, MA:MC, etc., are all equal. So in the hyperbola, A is the focus and CD the directrix when the ratio HA:HK is constant for all points of the curve; and in the parabola, A is the focus and CD the directrix when the ratio BA:BC is constant. In the ellipse this ratio is less than unity, in the parabola equal to unity, and in the hyperbola greater than unity. The ellipse and hyperbola have each two foci, and two corresponding directrixes, and the parabola has one focus and one directrix. In the ellipse the sum of the two lines from any point of the curve to the two foci is constant; that is: AG+GB=AH+HB; and in the hyperbola the difference of the corresponding lines is constant. The diameter which passes through the foci of the ellipse is the major axis. The diameter which being produced passes through the foci of the hyperbola is the transverse axis. The middle point of the major or the transverse axis is the center of the curve. Certain other curves, as the lemniscate and the Cartesian ovals, have points called foci, possessing properties similar to those of the foci of conic sections. In an ellipse, rays of light coming from one focus, and reflected from the curve, proceed in lines directed toward the other; in an hyperbola, in lines directed from the other; in a parabola, rays from the focus, after reflection at the curve, proceed in lines parallel to the axis. Thus rays from A in the ellipse are reflected to B; rays from A in the hyperbola are reflected toward L and M away from B. 3. A central point; a point of concentration. Aplanatic focus. (Opt.) See under Aplanatic. Conjugate focus (Opt.), the focus for rays which have a sensible divergence, as from a near object; -- so called because the positions of the object and its image are interchangeable. Focus tube (Phys.), a vacuum tube for R[oe]ntgen rays in which the cathode rays are focused upon the anticathode, for intensifying the effect. Principal, or Solar, focus (Opt.), the focus for parallel rays.
Aplanatism
Aplanatism A*plan"a*tism, n. Freedom from spherical aberration.
Aplanogamete
Aplanogamete A*plan`o*ga*mete", n. (Bot.) A nonmotile gamete, found in certain lower alg[ae].
Laplander
Laplander Lap"land*er, n. A native or inhabitant of Lapland; -- called also Lapp.
Laplandish
Laplandish Lap"land*ish, a. Of or pertaining to Lapland.
Rataplan
Rataplan Ra`ta`plan", n. [F.] The iterative sound of beating a drum, or of a galloping horse.

Meaning of APLAN from wikipedia

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- ago. This is a very long, intensive process Immigrants know #AWomanMakesAPlan #ItsGreatToBe72 ⁦@ToscaMusk⁩ ⁦@elonmusk⁩ ⁦@kimbal⁩ https://t.co/8fTrbiKXWj"...
- the group on January 28, 2024 and signed with Thai Entertainment Company APLAN in March 2024. Ma Jingxiang (30th) returned to Midsummer Cubs. He later...
- Humphrey – drums Tony Ortega – flute Bud Shank – alto saxophone Richard Aplan – baritone saxophone William Peterson, Tony Rusch, Larry McGuire, Paul Hubinon...
- mercurytree.net https://ventifacts.bandcamp.com/album/ventifacts K[aplan], Noah; K[aplan], Rosie (2018). "Notes from Underground: Ivan Wyschnegradsky's Manual...
- episodes 16 Production Running time 45–50 minutes Production companies Domundi Aplan International Group Original release Network Workpoint TV Release February...
- Science and Engineering. Academic Press. pp. 158–160. ISBN 0-12-601680-1. Aplan, Melissa P.; Gomez, Enrique D. (3 July 2017). "Recent Developments in Chain-Growth...
- Cell Cloning. 10 (5): 269–76. doi:10.1002/stem.5530100504. PMID 1453013. Aplan PD, Lombardi DP, Reaman GH, Sather HN, Hammond GD, Kirsch IR (1992). "Involvement...
- of Medicine. Zhao XF, Colaizzo-Anas T, Nowak NJ, Shows TB, Elliott RW, Aplan PD (April 1998). "The mammalian homologue of mago nashi encodes a serum-inducible...
- 7723–7729. doi:10.1158/0008-5472.CAN-07-6661. ISSN 0008-5472. PMID 18829525. Aplan PD, Lombardi DP, Reaman GH, et al. (1992). "Involvement of the ****tive...