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spline

[splahyn] /splaɪn/
noun
1.
a long, narrow, thin strip of wood, metal, etc.; slat.
2.
a long, flexible strip of wood or the like, used in drawing curves.
3.
Machinery.
  1. any of a series of uniformly spaced ridges on a shaft, parallel to its axis and fitting inside corresponding grooves in the hub of a gear, etc., to transmit torque.
  2. feather key.
4.
Building Trades. a thin strip of material inserted into the edges of two boards, acoustic tiles, etc., to make a butt joint between them; a feather.
5.
Mathematics, Engineering. a function that has specified values at a finite number of points and consists of segments of polynomial functions joined smoothly at these points, enabling it to be used for approximation and interpolation of functions.
verb (used with object), splined, splining. Machinery
6.
to provide with a spline or key.
7.
to provide with a keyway.
Origin
1750-1760
1750-60; orig. East Anglian dial.; perhaps akin to splint; compare Old English splin spindle
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for splines

spline

/splaɪn/
noun
1.
any one of a series of narrow keys (external splines) formed longitudinally around the circumference of a shaft that fit into corresponding grooves (internal splines) in a mating part: used to prevent movement between two parts, esp in transmitting torque
2.
a long narrow strip of wood, metal, etc; slat
3.
a thin narrow strip made of wood, metal, or plastic fitted into a groove in the edge of a board, tile, etc, to connect it to another
verb
4.
(transitive) to provide (a shaft, part, etc) with splines
Word Origin
C18: East Anglian dialect; perhaps related to Old English splin spindle; see splint
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for splines

spline

n.

"long, thin piece of wood or metal," 1756, from East Anglian dialect, perhaps from older Danish splind or North Frisian splinj.

Online Etymology Dictionary, © 2010 Douglas Harper
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