The term 'eroded matter' can be defined as DETRITUS, which is a 8-letter word. DETRITUS is the material that is left behind after erosion has taken place. It is composed of small particles of rock, soil, and other materials that have been broken down by the forces of nature. DETRITUS is an important part of the natural environment, as it provides nutrients for plants and animals and helps to maintain the balance of the ecosystem.