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The cardinal number that is the sum of seven and one
Answer for the clue "The cardinal number that is the sum of seven and one ", 5 letters:
octad
Alternative clues for the word octad
Word definitions for octad in dictionaries
Wiktionary
Word definitions in Wiktionary
n. A group of eight things
Usage examples of octad.
The interstellar drive had yet to be run continuously for years and whole octads on end.