from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
Roman surveying instrumenthaving plumb lineshanging from four arms at right angles
Sorry, no etymologies found.
The groma consisted of crossed arms resting on a bracket attached to a vertical staff.
The groma could be used to survey straight lines, right angles and rectangles.
The ancient Romans did pretty well using just three simple instruments: the groma, the chorobate, and measuring rods.
Scholars have talked, indeed, of a Greek origin or of an Etruscan origin, and the technical term for the Roman surveying instrument, _groma_, has been explained as the Greek word 'gnomon', borrowed through an
You learn a little bit about ancient Rome, and about how they did things love that groma - the surveying tool that's like a dangly mobile and allowed the