† aˈssimilant,ppl.a.andn.Obs. [ad. L. assimilānt-em, pr.pple. of assimilāre: see assimilate and -ant.] A.adj. Assimilating. rare—0. B.n. An assimilating agent. 1684tr.Bonet's Merc. Compit. vi. 195 The more these Humours are heated..the more willingly they turn to the Assimilants side.