noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A line drawn on a map through all points having the same value of some measurable quantity.
2. 2
   a line drawn on a map connecting points having the same numerical value of some variable wordnet
3. 3
   A line in a phase diagram indicating the same mole fraction.

Synonyms

All synonyms

isarithmisogramisogramisolineisopract

Etymology

From iso- + Ancient Greek πλῆθος (plêthos, “a great number”).

Related phrases

contour line

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.