bluegrass

/B L UW1 G R AE0 S/
noun
  1. 1

    Kentucky bluegrass, Poa pratensis.

noun
  1. 1

    A style of country music with roots in Scots-Irish Appalachian folk music, blues, and jazz and characterized by banjos, fiddles, acoustic guitars, dobros, and mandolins; but containing no drums, electric guitars, pianos or other keyboard or wind instruments.

Source: https://en.wiktionary.org/wiki/bluegrass