bluegrass means kentucky bluegrass (Poa pratensis). Lexicurio rates it Rare gem — a strength score of 73 out of 100.
Etymology
From blue + grass, from the bluish appearance of the massed grass in late Spring.
noun
- Kentucky bluegrass (Poa pratensis).
- A subgenre 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; using a bass fiddle to carry its rhythm.