SPLINING
Verb
splining
present participle of spline
Source: Wiktionary
Splin"ing, a.
Definition: Of or pertaining to a spline. Splining machine, a machine tool
for cutting grooves, key seats, or slots; a slotting machine.
SPLINE
Spline, n.
1. A rectangular piece fitting grooves like key seats in a hub and a
shaft, so that while the one may slide endwise on the other, both
must revolve together; a feather; also, sometimes, a groove to
receive such a rectangular piece.
2. A long, flexble piece of wood sometimes used as a ruler.
Source: Webster’s Unabridged Dictionary 1913 Edition