What is "waals"

Usage examples of "waals".

The active molecules used weak interactions—hydrogen bonding, van der Waals forces and hydrophobic recognition—to assemble themselves into a three-dimensional structure, supramolecular arrays thousands of molecules long.

On the mediatron, the subassembly drifted away from the main group under its own momentum, then slowed, stopped, and began to fall back toward it, drawn in by weak van den Waals forces.