octadecavô

== Portuguese == === Etymology === From octadeca- +‎ avô. === Pronunciation === Rhymes: -o Hyphenation: oc‧ta‧de‧ca‧vô === Noun === octadecavô m (plural octadecavôs, feminine octadecavó, feminine plural octadecavós) great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-grandfather === References === Dúvida Linguística