of, relating to, or shaped like a triangle; having three angles; triangular. 2. Crystallography. having threefold symmetry. Origin of trigonal.
An online survey conducted in the U.S. points out that the most popular music genre in the U.S. is rock, with 40 percent of respondents choosing this option. The second and third most listened to music genres are oldies and country respectively, while hip hop/rap is favored by a smaller niche of American listeners.
Pop music is a type of popular music that many people like to listen to. The term pop music can be used for all kinds of music that was written to be popular. The word pop music was used from about 1880 onwards, when a type of music called music was popular.