What does "scintillator" mean?

Any substance that glows under the action of photons or other high-energy particles

How do you pronounce "scintillator"?

Pronounced //ˌsɪntɪˈleɪtə(ɹ)//.

/ˌsɪntɪˈleɪtə(ɹ)/ noun

noun ·Rare ·Advanced level

Noun

1
Any substance that glows under the action of photons or other high-energy particles

From scintillate + -or.