rongorongo /ˌɹɒŋəʊˈɹɒŋəʊ/ noun1 •An early glyphic writing system of Easter Island, written in reverse boustrophedon and as yet undeciphered.Rongorongo glyph 700 , which resembles a fish, is written on many human skulls. It is thought that it may stand for ika, which means "fish" or "war casualty" in Rapa Nui.
