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Spiral

Spiral Spi"ral, n. [Cf. F. spirale. See Spiral, a.] 1. (Geom.) A plane curve, not re["e]ntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed point called the pole. Cf. Helix. 2. Anything which has a spiral form, as a spiral shell. Equiangular spiral,a plane curve which cuts all its generatrices at the same angle. Same as Logarithmic spiral, under Logarithmic. Spiral of Archimedes, a spiral the law of which is that the generatrix moves uniformly along the revolving line, which also moves uniformly.

Spiral Spi"ral, n. [Cf. F. spirale. See Spiral, a.] 1. (Geom.) A plane curve, not re["e]ntrant, described by a point, called the generatrix, moving along a straight line according to a mathematical law, while the line is revolving about a fixed point called the pole. Cf. Helix. 2. Anything which has a spiral form, as a spiral shell. Equiangular spiral,a plane curve which cuts all its generatrices at the same angle. Same as Logarithmic spiral, under Logarithmic. Spiral of Archimedes, a spiral the law of which is that the generatrix moves uniformly along the revolving line, which also moves uniformly.

Spiral

Spiral Spi"ral, a. [Cf. F. spiral. See Spire a winding line.] 1. Winding or circling round a center or pole and gradually receding from it; as, the spiral curve of a watch spring. 2. Winding round a cylinder or imaginary axis, and at the same time rising or advancing forward; winding like the thread of a screw; helical. 3. (Geom.) Of or pertaining to a spiral; like a spiral. Spiral gear, or Spiral wheel (Mach.), a gear resembling in general a spur gear, but having its teeth cut at an angle with its axis, or so that they form small portions of screws or spirals. Spiral gearing, a kind of gearing sometimes used in light machinery, in which spiral gears, instead of bevel gears, are used to transmit motion between shafts that are not parallel. Spiral operculum, an operculum whih has spiral lines of growth. Spiral shell, any shell in which the whorls form a spiral or helix. Spiral spring. See the Note under Spring, n., 4.

Spiral Spi"ral, a. [Cf. F. spiral. See Spire a winding line.] 1. Winding or circling round a center or pole and gradually receding from it; as, the spiral curve of a watch spring. 2. Winding round a cylinder or imaginary axis, and at the same time rising or advancing forward; winding like the thread of a screw; helical. 3. (Geom.) Of or pertaining to a spiral; like a spiral. Spiral gear, or Spiral wheel (Mach.), a gear resembling in general a spur gear, but having its teeth cut at an angle with its axis, or so that they form small portions of screws or spirals. Spiral gearing, a kind of gearing sometimes used in light machinery, in which spiral gears, instead of bevel gears, are used to transmit motion between shafts that are not parallel. Spiral operculum, an operculum whih has spiral lines of growth. Spiral shell, any shell in which the whorls form a spiral or helix. Spiral spring. See the Note under Spring, n., 4.

- Archimedean spiral hyperbolic spiral Fermat's spiral lituus logarithmic spiral Cornu spiral spiral of Theodorus Fibonacci Spiral (golden spiral) The involute...

- In geometry, a golden spiral is a logarithmic spiral whose growth factor is φ, the golden ratio. That is, a golden spiral gets wider (or further from...

- Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, form part of the Hubble...

- Look up spiral staircase in Wiktionary, the free dictionary. A spiral staircase is a type of stairway characterized by its helical shape Spiral Staircase...

- Spiral: From the Book of Saw (or simply Spiral) is a 2021 American horror-thriller film directed by Darren Lynn Bousman and written by Josh Stolberg and...

- The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team...

- spiral, equiangular spiral, or growth spiral is a self-similar spiral curve that often appears in nature. The first to describe a logarithmic spiral was...

- individually distinguished by the naked eye. The Milky Way is a barred spiral galaxy with a D25 isophotal diameter estimated at 26.8 ± 1.1 kilop****cs...

- The Archimedean spiral (also known as the arithmetic spiral) is a spiral named after the 3rd-century BC Gr**** mathematician Archimedes. It is the locus...

- The Ulam spiral or prime spiral is a graphical depiction of the set of prime numbers, devised by mathematician Stanisław Ulam in 1963 and po****rized in...

- In geometry, a golden spiral is a logarithmic spiral whose growth factor is φ, the golden ratio. That is, a golden spiral gets wider (or further from...

- Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, form part of the Hubble...

- Look up spiral staircase in Wiktionary, the free dictionary. A spiral staircase is a type of stairway characterized by its helical shape Spiral Staircase...

- Spiral: From the Book of Saw (or simply Spiral) is a 2021 American horror-thriller film directed by Darren Lynn Bousman and written by Josh Stolberg and...

- The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team...

- spiral, equiangular spiral, or growth spiral is a self-similar spiral curve that often appears in nature. The first to describe a logarithmic spiral was...

- individually distinguished by the naked eye. The Milky Way is a barred spiral galaxy with a D25 isophotal diameter estimated at 26.8 ± 1.1 kilop****cs...

- The Archimedean spiral (also known as the arithmetic spiral) is a spiral named after the 3rd-century BC Gr**** mathematician Archimedes. It is the locus...

- The Ulam spiral or prime spiral is a graphical depiction of the set of prime numbers, devised by mathematician Stanisław Ulam in 1963 and po****rized in...

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