trig point

noun — 2 senses

noun

Etymology Clipped compound of triangulation point.

UK A fixed pillar with a metal housing for a theodolite on the top of a high point in the landscape; originally used for making Ordnance Survey maps.

Any fixed structure that marks a measuring point used in triangulation.

Synonyms: triangulation pillar, triangulation station, trigonometrical point

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.