A measure of the efficiency of @C00796@ of molecules or atoms which collide with @A00176@ particles, cloud droplets, etc. The accommodation @C01124@ is the fraction of the collisions which result in the @C00796@ of the molecules (atoms, radicals, etc.) by the particle, cloud droplet, etc.; fraction of colliding molecules which are not reflected but which enter the surface of an aqueous @A00176@. Synonymous with @S06012@.