detritus
de.tri.tus \di-'tri-t-*s\ \-'tri-t-*s, -'tri--.tu:s\ n or de.tri.tus [F de`tritus, fr. L detritus, pp. of deterere] pl 1: loose material that results directly from rock disintegration esp. when composed of rock fragments 2: a product of disintegration or wearing away