NIXIE, or NIXY, a female water-sprite. The word is adapted from Ger. Nixe, the male water-sprite being Nix. The general term covering both the male and female is " nicker," a kelpie. This also appears in Dutch nikker. The Old Teutonic nikus may be connected with the root which appears in Gr. vl^tiv or vivrtai, " to wash."
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)