absorption, soaking up -- ((chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid)
absorption -- ((physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium; "the absorption of photons by atoms or molecules")
assimilation, absorption -- (the social process of absorbing one cultural group into harmony with another)
assimilation, absorption -- (the process of absorbing nutrients into the body after digestion)