Definition of spline in English:


Line breaks: spline
Pronunciation: /splʌɪn


  • 1A rectangular key fitting into grooves in the hub and shaft of a wheel, especially one formed integrally with the shaft which allows movement of the wheel on the shaft.
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    • UAW Local 2101 represents 17 workers at Wedin, where they manufacture ball screws, nuts, gears, shafts, splines and motion-control systems.
    • Engineered to maintain original GM dimensions and process parameters, these axles are induction hardened and feature a 100-percent machined shaft and precision nobbed splines.
    • Using the concave roller to carefully roll the spline into the groove over the screen.
  • 1.1A corresponding groove in a hub along which the key may slide.
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    • The hydraulic disc brakes are small and light, and the rotors fit onto splines on lightweight hubs.
  • 2A slat of wood, metal, etc..
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    • Run a sharp utility knife or single-edge razor blade between the spline and the metal frame to cut off excess screening.
  • 2.1A flexible wood or rubber strip used especially in drawing large curves.
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    • Therefore, there is more flexibility in the fitted splines than is strictly necessary to model the data.
    • The great power of ISIS-Drive's open standard is also its weakness - the tapered spline requires great care to produce and the ISIS standard leaves manufacturing open to interpretation in some respects.
  • 3 (also spline curve) Mathematics A continuous curve constructed so as to pass through a given set of points and have a certain number of continuous derivatives.
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    • The data was therefore fit nonparametrically to a smooth curve using the Dierckx algorithm for cubic spline curve fitting.
    • Did you know that the most pleasing shape to man is the spline curve?
    • Garrett was quick to recommend the use of cubic splines for the representation of smooth curves.


[with object] Back to top  
  • 1Secure (a part) by means of a spline: the clutch units are splined on to the mainshaft
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    • The inner rotor portion of the pump is splined to one output on the axle and the outer drum portion of the pump is splined to the other.
  • 1.1 (usually as adjective splined) Fit with a spline: splined freewheels
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    • That combination creates a lighter, stiffer crankset than older square-taper spindles and uses Shimano's widely available ES - 70 splined bottom bracket.
    • The splined interface accepts the rotor much like freehub accepts the cassette - just slide the rotor on and cinch-down using a single lock-ring.
    • I want to replace my BB / Crank with a splined version, but the spindle is offered in 113 mm.


mid 18th century (originally East Anglian dialect): perhaps related to splinter.

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elaborate ornamentation of a vocal melody