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Anonymous Posted 16 years ago
Grammar

"in/on/of the order of"

In the context of a scientific document/report which of the following sentences are acceptable? If more than one, then which is the prefered usage?

a) The nominal accuracy is in the order of 5 metres.
b) The nominal accuracy is of the order of 5 metres.
c) The nominal accuracy is on the order of 5 metres.
  

Top answer

The preposition on is correct.

  • The preposition on is correct.
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3 Answers
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The preposition on is correct.
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Sorry for the anonymous post. I have now registered.
Can you explain why "on" is the correct preposition? For some reason it just 'sounds' the least correct to me.
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Hi Nevp, thanks for registering and welcome to the Forums!

Prepositions are notoriously difficult - sometimes it is hard to know the right one for the context.
In this case, "on the order of" is an idiom meaning "approximately".

Regards,
A-

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