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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 Cornu spiral Fermat's spiral hyperbolic spiral lituus logarithmic 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 Staircase may refer to: The Spiral Staircase (1946 film), an American psychological thriller film The Spiral Staircase (1961 film), a 1961 American...

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

- The Downward Spiral is the second studio album by American industrial rock band Nine Inch Nails, released on March 8, 1994, by Nothing Records and Interscope...

- 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...

- because of two reasons: The wider the spiral, the more steps can be accommodated per spiral. Therefore, if the spiral is large in diameter, via having a...

- that the Milky Way is just one of many galaxies. The Milky Way is a barred spiral galaxy with a diameter between 150,000 and 200,000 light-years (ly). It...

- Spiral Jetty is an earthwork sculpture constructed in April 1970 that is considered to be the most important work of American sculptor Robert Smithson...

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

- 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 Staircase may refer to: The Spiral Staircase (1946 film), an American psychological thriller film The Spiral Staircase (1961 film), a 1961 American...

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

- The Downward Spiral is the second studio album by American industrial rock band Nine Inch Nails, released on March 8, 1994, by Nothing Records and Interscope...

- 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...

- because of two reasons: The wider the spiral, the more steps can be accommodated per spiral. Therefore, if the spiral is large in diameter, via having a...

- that the Milky Way is just one of many galaxies. The Milky Way is a barred spiral galaxy with a diameter between 150,000 and 200,000 light-years (ly). It...

- Spiral Jetty is an earthwork sculpture constructed in April 1970 that is considered to be the most important work of American sculptor Robert Smithson...

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

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