adhesion; adhesive force
Technical term used in physics, engineering, and materials science to describe the force that holds different substances together at their interface.
This adhesive has very high adhesion to metal.
The durability of the coating depends greatly on its adhesion to the substrate.
凝集力 refers to cohesive force (within the same substance), whereas 凝着力 is adhesive force (between different substances).
Compound of 凝着 (gyōchaku, 'adhesion') + 力 (ryoku, 'force'). The term is a modern technical coinage based on Chinese-derived morphemes.