Spiral spring
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. [1913 Webster]

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. [1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral. [1913 Webster]

{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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • spiral spring — Spring Spring, n. [AS. spring a fountain, a leap. See {Spring}, v. i.] 1. A leap; a bound; a jump. [1913 Webster] The prisoner, with a spring, from prison broke. Dryden. [1913 Webster] 2. A flying back; the resilience of a body recovering its… …   The Collaborative International Dictionary of English

  • spiral spring — noun a spring that is wound like a spiral • Hypernyms: ↑spring • Hyponyms: ↑hairspring * * * noun : a spring consisting of a wire coiled usually in a flat spiral or in a helix * * * a form of spring consisting of a wire coiled in a helix. See… …   Useful english dictionary

  • spiral spring — noun Date: 1690 a spring consisting of a wire coiled usually in a flat spiral or in a helix …   New Collegiate Dictionary

  • spiral spring — a form of spring consisting of a wire coiled in a helix. See illus. under spring. [1680 90] * * * …   Universalium

  • spiral spring — spi′ral spring′ n. bui mac a form of spring consisting of a wire coiled in a helix • Etymology: 1680–90 …   From formal English to slang

  • 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. [1913 Webster] 2. Winding round a cylinder or imaginary axis, and at… …   The Collaborative International Dictionary of English

  • Spiral gear — 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. [1913 Webster] 2. Winding round a cylinder or imaginary axis,… …   The Collaborative International Dictionary of English

  • Spiral gearing — 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. [1913 Webster] 2. Winding round a cylinder or imaginary axis,… …   The Collaborative International Dictionary of English

  • Spiral operculum — 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. [1913 Webster] 2. Winding round a cylinder or imaginary axis,… …   The Collaborative International Dictionary of English

  • Spiral shell — 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. [1913 Webster] 2. Winding round a cylinder or imaginary axis,… …   The Collaborative International Dictionary of English

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