doc·u·sate 
(dŏkyə-sāt′)
(dŏkyə-sāt′)n.
A surface-active agent, C20H37O7S, given orally in the form of its sodium salt, that decreases surface tension in the intestinal tract and acts as a stool softener.
[D(I)-1 + oc(tyl), radical containing eight carbon atoms (OCT(O)- + -YL) + -sate (shortening of sulfosuccinate, one of its constituents : SULFO- + SUCCINATE).]