macro: a single computer instruction that results in a series of instructions in machine language
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
eutrophication: excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant life; the decomposition of the plants depletes the supply of oxygen, leading to the death of animal life