noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A line of equal or constant dew point on a graph or chart, such as a weather map.

Etymology

From iso- + Ancient Greek δρόσος (drósos, “dew”) + Ancient Greek θερμός (thermós, “warm”) (equivalent to thermo-).

Related phrases

dew point

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