triangulation pillar
triangulation pillar · triangulation pillars
A concrete pillar used by the Ordnance Survey as a point for taking theodolite…A concrete pillar used by the Ordnance Survey as a point for taking theodolite measurements, used in determining the exact shape of the country in a mid-20th-century retriangulation project.
Meaning
1 senses(UK)A concrete pillar used by the Ordnance Survey as a point for taking theodolite measurements, used in determining the exact shape of the country in a mid-20th-century retriangulation project.
Forms
plural: triangulation pillars| Singular | triangulation pillar |
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| Plural | triangulation pillars |
regular