ordnance datum

noun

mean sea level calculated from observation taken at Newlyn, Cornwall, and used as the official basis for height calculation on British mapsAbbreviation: OD

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anchorite
a granular metamorphic rock.
a person who has retired to a solitary place for a life of religious seclusion.
a hobble or fetter for a horse or other animal.
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Words nearby ordnance datum

ordinary-language philosophy, ordinate, ordination, ordn., ordnance, ordnance datum, ordnance survey, ordo, ordonnance, ordos, ordovician
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