seraphim

noun
  1. 1

    A six-winged angel; the highest choir or order of angels in Christian angelology, ranked above cherubim, and below God. They are the 5th highest order of angels in Jewish angelology. A detailed description can be found at the beginning of Isaiah chapter 6

Source: https://en.wiktionary.org/wiki/seraph, https://en.wiktionary.org/wiki/seraphim