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O_______
Definitions
the cardinal number that is the sum of seven and one
Word origin
From the Latin octōnārius (“containing eight”), from octōnī (“eight at a time”, “by eights”, “eight each”) + -ārius (whence the English suffix -ary).
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
No curated clues for octonary yet.