G-stringn.

G-string (n.)1878, geestring, "loincloth worn by an American Indian," originally the string that holds it up, etymology unknown. The spelling with G (1882) is perhaps from influence of violin string tuned to a G (in this sense G string is first recorded 1831), the lowest and heaviest of the violin strings. First used of women\\'s attire 1936, with reference to strip-teasers. I AM the spirit of the silver "G": I am silvered sadness, I am moonlit gladness, I am that fine madness Of reverence half, and half of ecstasy [from "Spirit of the \\'G\\' String," Alfred L. Donaldson, in "Songs of My Violin," 1901]