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 music genre that developed from the mid-1950s as a softer alternative to rock 'n' roll and later to rock music. Popular music or Pop music, as it is more common â¦ ly called, is difficult to define. The forties and fifties saw the emergence of rock 'n' roll.