Tending to assimilate; producing assimilation; assimilative: as, assimilatory organs.

adjective. Tending to assimilate, or produce assimilation.

adjective. That tends to assimilate, or to produce assimilation

adjective. capable of taking (gas, light, or liquids) into a solution

"And this assimilatory process was racialized from its inception because no blacks and few Asians were permitted to take part, in the sense that they were excluded from regiments defined as white."

absorbent  absorptive