hel·ot·ism (hělə-tĭzəm)
n.
► A system under which a nominally free social class or a religious, national, or racial minority is permanently oppressed and degraded.
► A type of symbiosis, as among certain ants, in which one species is dominant and makes the members of another species perform the tasks required for their mutual survival.

[TahlilGaran] American Dictionary ▲