From sereia (“mermaid”) + -o (masculine suffix).
- (Brazil) IPA(key): /seˈɾej.u/ [seˈɾeɪ̯.u]
- (Southern Brazil) IPA(key): /seˈɾej.o/ [seˈɾeɪ̯.o]
sereio m (plural sereios)
- merman (legendary creature, human male from the waist up, fishlike from the waist down)
- Synonym: homem-sereia
- Antonym: sereia