mosaica picture or pattern produced by arranging small coloured pieces of stone or glassByzantine churches are famous for their elaborate gold mosaic decorations on walls and ceilings.NoteByzantine churches are famous for their elaborate gold mosaic decorations on walls and ceilings.Elon.io is an online learning platformWe have an entire course teaching TOEFL Academic Vocabulary grammar and vocabulary.Start learning TOEFL Academic Vocabulary now