energy crop: A crop which is grown to be used to provide energy, e.g., a fast-growing tree. Biomass itself can come from a variety of sources, including energy crops such as miscanthus and short-rotation willow, forestry trimmings, off-cuts and roots, tree surgeons chips, reclaimed timber and municipal solid waste, some industrial waste, sewage sludge, liquid animal waste, and the enormous amount of food waste. Growing energy crops provides farmers with renewable energy sources and additional income.