in rerum natura

adverb

in re·​rum na·​tu·​ra

-ˈrārəmnəˈtu̇rə,

-ˈrēr-

: in the nature of things in the world of nature as distinguished from the world of human beings : in the realm of material things

they do not signify anything in rerum natura

—R. F. McRae

Word History

Etymology

Latin

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