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The following 5 entries include the term waals.
van der Waals forces
plural noun: the relatively weak attractive forces that act on neutral atoms and molecules and that arise because of the electric polarization induced in each of the particles by the presence of other particles
van der Waals
adjective: of, relating to, or arising from van der Waals forces
van der Waals adsorption
noun: adsorption due to van der Waals forces between the adsorbed molecules and the adsorbing material —opposed to chemisorption
van der Waals equation
noun: an equation that defines the physical state of a homogeneous gas, is a modification of the ideal-gas equation, and more nearly describes the properties of actual gases: (p + (a/v2)) (v−b)=RT where p is the pressure, v the specific volume, R the gas constant, T the absolute temperature, and a and b are constants depending respectively on the cohesion between the molecules and the volume occupied by the molecules compare gas law sense c
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Merriam-Webster unabridged
