Meaning of van der Waals' equation

van' der Waals'" equa'tion

Pronunciation: (van' dur wälz", wôlz" Du. vän" dur väls'), [key]
— Thermodynamics. Thermodynamics.
  1. an equation of state relating the pressure, volume, and absolute temperature of a gas, taking into account the finite size of the molecules and the attractive force between them.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.