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Teo Posted 20 years ago
Grammar

focusses

Each unit focusses on a different area of methodology and ....

There seems to be no such spelling in the dictionaries that I have consulted. Is it a typo?
  

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com/dictionary/focuses

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2 Answers
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It is modeled after "bus" "busses" and is an alternate spelling, as far as I know. Nowadays it seems that most writers do not double the "s" in such patterns.

CJ

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