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.
For other genres see Popular Music Genres. Country music was one of the first genres of modern American popular music, and old-time music was its earliest style. It developed in the southeastern states of the USA as a mix of folk music from the British Isles, church music and African American blues.nother style called bluegrass developed in the early 1950s. It was a revival of old-time country music led by Bill Monroe and the Blue Grass Boys. In the 70s, the Nitty Gritty Dirt Band became popular, and since the mid-80s the most successful bluegrass artist has been Alison Krauss.