spline

noun

ˈsplīn 

1

: a thin wood or metal strip used in building construction

2

: a key that is fixed to one of two connected mechanical parts and fits into a keyway in the other

also : a keyway for such a key

3

: a function that is defined on an interval, is used to approximate a given function, and is composed of pieces of simple functions defined on subintervals and joined at their endpoints with a suitable degree of smoothness

Examples of spline in a Sentence

Recent Examples on the Web

The system uses a mathematical method known as a Hermite spline to create smooth and precisely controllable trajectories while minimizing travel time. — Jijo Malayil, Interesting Engineering, 19 May 2026

Custom spline shafts—designed to mate the Ferrari crankshaft to a Motus MSTR six-speed sequential transmission—were tested, broken, and remade to withstand the demands of a high-revving V-8. — Eric Hendrikx, Robb Report, 22 Apr. 2026

Upgraded Strange half-shaft splines stand ready to handle the engine’s 800 foot-pounds of torque. — Karl Brauer, Forbes.com, 21 Apr. 2026

Damage to the axle hub splines can cause the vehicle to roll away, increasing the chance of a crash, the recall notice said. — Melina Khan, USA Today, 12 Aug. 2025

The rear axle hub bolt may fatigue and break, according to the notice, which can result in damage to the axle hub splines. — Emily Deletter, USA TODAY, 10 June 2024

Word History

Etymology

origin unknown

First Known Use

1756, in the meaning defined at sense 1

Rhymes for spline

• finny
• ginny
• jinny
• mini
• minnie
• ninny
• pinnae
• skinny
• spinney
• swinney
• tinny
• whinny