Definition of luminescent in US English:

luminescent

adjective

  • Emitting light not caused by heat.

    ‘the team is developing a transparent luminescent solar concentrator’
    ‘there's something calming about watching a luminescent jellyfish’

Pronunciation

luminescent

/ˌlo͞oməˈnes(ə)nt//ˌluməˈnɛs(ə)nt/