ORTHOGON
\ˈɔːθɒɡən], \ˈɔːθɒɡən], \ˈɔː_θ_ɒ_ɡ_ə_n]\
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2010
- New Age Dictionary Database
By Oddity Software
1913
- Webster's Revised Unabridged Dictionary
By Noah Webster.
1899
- The american dictionary of the english language.
By Daniel Lyons
1908
- Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson
1871
- The Cabinet Dictionary of the English Language