opisometer

A cartographer uses an opisometer to measure a winding river on a map.

Definition

1. Noun:
   • A measuring instrument: An "opisometer" is a device used to measure the length of curved lines on a map or drawing. It typically consists of a small wheel that is rolled along the curve, with a dial or scale that records the distance traveled.

Usage Examples

• (The device measured the curved path of the river accurately.)
• (The instrument helped determine the length of irregular routes.)

Advanced Usage

• "to employ an opisometer": to use this specific tool in surveying or map-making.
  • The surveyor employed an opisometer to trace the contour lines of the terrain. (The device measured the curved elevation lines.)

Variants and Related Words

• Opisometric (adj): relating to or involving an opisometer.
  • The opisometric measurement of the coastline was precise. (The measurement using the device was accurate.)

Synonyms

• Map measurer: a general term for a device that measures distances on a map.
• Curvimeter: an alternative name for the same instrument, often used in technical contexts.

Related Idioms

• None directly associated with "opisometer," as it is a specialized technical term.