sb. pl. [pl. of L. ējectāmentum, f. ējectāre: see prec.] Substances ejected by eruptive forces.
1863. Lyell, Antiq. Man, x. (ed. 3), 192. Yet the cone, an incoherent heap of scoriæ and spongy ejectamenta, stands unmolested.
1879. Rutley, Stud. Rocks, iv. 32. These fragmentary ejectamenta are often thrown high into the air.
