scintillescent
/ˌsɪntɪˈlɛsnt/adjective
That scintillates (literal and figurative ); sparkling, scintillating.
Origin
Mid 19th century; earliest use found in Edward Robert Bulwer-Lytton (1831–1891), viceroy of India and poet. Irregularly from classical Latin scintillāre scintillate + -escent.