Definition of opisometer
: an instrument used for measuring curved lines (as on a map) and consisting essentially of a screw with a wheel-shaped nut that is made to rotate forward along the curved lines and then backward to its original position on the screw along a straight scale
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of opisometer
from Greek opisō backwards + English -meter; akin to Greek opisthen
Seen and Heard
What made you want to look up opisometer? Please tell us where you read or heard it (including the quote, if possible).