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ordinary interest
Ordinary level
ordinary rate
ordinary shares
ordinate
ordination
ordn.
ordnance
ordnance datum
Ordnance Survey
ordo
ordonnance
Ordovician
ordure
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ordnance datum

ord·nance da·tum


noun 
Definition:
 
sea level in U.K.: the sea-level standard adopted by the Ordnance Survey in the United Kingdom for mapmaking purposes. It is established as the sea level at Newlyn, in Cornwall.

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