Meanings
oto1
plural otos
- informalAn otocinclus (freshwater fish, genus Otocinclus).
All the tetras in my tank (3 species - black neons, Pristellas, and red eyes) died within a 36 hour period. The corys and otos in the same tank are fine. There was no change in water quality, feeding habits, or water temperature. I have no idea why all the tets would die in such a short time span.
1998 January 24, LASP, “Dead tetras”, in rec.aquaria.freshwater.misc (Usenet)
OTO2
- abbreviationinitialismInitialism of Ordo Templi Orientis.
Oto3
alternative Otoe
- pluralplural onlyA Midwestern Native American tribe who speak the Chiwere language.
Synonyms & antonyms
nouna member of the Siouan people inhabiting the valleys of the Platte and Missouri rivers in Nebraska
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Clipping of otocinclus.
Full word history & related roots →Rhymes & wordplay
Anagrams
Cite this entry
oto. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/oto
“oto.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/oto. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “oto,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/oto.
Source: oto on Wiktionary, CC BY-SA 4.0.