natural-scientific
/ˌnatʃ(ə)rəlˌsʌɪənˈtɪfɪk/ /ˌnatʃ(ə)r(ə)lˌsʌɪənˈtɪfɪk/adjective
Of or relating to natural science or a natural science.
Origin
Mid 19th century; earliest use found in William Whewell (1794–1866), college head and writer on the history and philosophy of science. From natural + scientific, after natural science.