# spline

Line breaks: spline
Pronunciation: /splʌɪn /

## Definition of spline in English:

### noun

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.
Example sentences
• 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.
Example sentences
• The hydraulic disc brakes are small and light, and the rotors fit onto splines on lightweight hubs.
2A slat of wood, metal, etc.
Example sentences
• 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.
Example sentences
• 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.
Example sentences
• 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.

### verb

1Secure (a part) by means of a spline: the clutch units are splined on to the mainshaft
More example sentences
• 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
More example sentences
• 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.

### Origin

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

## Definition of spline in:

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= trending

## More on spline

### More words in this category

ball bearing bleed butterfly valve fence filter press
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Pronunciation: rɪˈzɪlɪənt