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WordReference Random House Learner's Dictionary of American English © 2024ˈnat•u•ral ˈsci•ence, n. - Biology, Physicsa science or knowledge of objects, events, or processes in nature: [countable]The natural sciences include biology, physics, chemistry, and geology.[uncountable]to major in natural science.
WordReference Random House Unabridged Dictionary of American English © 2024nat′ural sci′ence, - a science or knowledge of objects or processes observable in nature, as biology or physics, as distinguished from the abstract or theoretical sciences, as mathematics or philosophy.
Collins Concise English Dictionary © HarperCollins Publishers:: natural science n - the sciences collectively that are involved in the study of the physical world and its phenomena, including biology, physics, chemistry, and geology, but excluding social sciences, abstract or theoretical sciences, such as mathematics, and applied sciences
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