I have chosen to call the signs which were used in the writing on the Easter Island wooden boards for 'miroglyphs'.

The miroglyphs might be seen as a kind of 'hieroglyphs' (= holy writings). But as the Polynesian word 'miro' means (among other things) 'wood' and as the Easter Islanders used pieces of wood to write on I prefer to use the name miroglyphs.

Usually, though, I just write 'glyphs'.