ordnance datum
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noun
mean sea level calculated from observation taken at Newlyn, Cornwall, and used as the official basis for height calculation on British mapsAbbreviation: OD
QUIZ
GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!
Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
Words nearby ordnance datum
ordinary wave, ordinate, ordination, ordn., ordnance, ordnance datum, Ordnance Survey, ordo, Ordóñez, ordonnance, Ordos
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