Lewis & Short

lūmĭnōsus, a, um, adj. [lumen], full of light, light, luminous.

  1. I. Lit.: aedificia, Vitr. 6, 9: oleum luminosius, Aug. Ep. 137 fin.
  2. II. Trop., bright, conspicuous, prominent, remarkable: partes orationis, Cic. Or. 36, 125.
    Sup.: luminosissima caritas, Aug. Ep. 144.