SCIN'TILLATE, verb intransitive [Latin scintillo. This word seems to be a diminutive formed on the Teutonic scinan, Eng. to shine.] 1. To emit sparks or fine igneous particles. Marbles do not scintillate with steel. 2. to sparkle, as the fixed stars.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI