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.
Next (Sound) Soul music is a musical genre that combines rhythm and blues and gospel music and originated in the late 1950s in the United States. Rhythm and blues (a combination of blues and jazz) arose in the 1940s as small groups of predominately African-American musicians composed using the blues tradition.