Webster's Revised Unabridged Dictionary · 1913

Scintillation

Scintillation , noun

[Latin scintillatio: compare French scintillation.]

1.
The act of scintillating.
2.
A spark or flash emitted in scintillating.
These scintillations are... the inflammable effluences discharged from the bodies collided. — Sir T. Browne