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|Noun||1.||natural phenomenon - all phenomena that are not artificial|
phenomenon - any state or process known through the senses rather than by intuition or reasoning
chemical phenomenon - any natural phenomenon involving chemistry (as changes to atoms or molecules)
geological phenomenon - a natural phenomenon involving the structure or composition of the earth
organic phenomenon - (biology) a natural phenomenon involving living plants and animals
physical phenomenon - a natural phenomenon involving the physical properties of matter and energy