Back-formation from onomatopoeia.
onomatope (plural onomatopes)
- (linguistics) A word formed by onomatopoeia or mimesis
1892 January 1, “Notes and News”, in Science, volume 19, number 465, page 3:
- Some of the onomatopes were given with the notations of their respective sounds as they appear to the Indian ear; thus, the sound of the plane and drawing-knife (s-s-s) becomes the root siu […]