ex rerum natura

adverb

From the nature of things; from the nature of the case; from nature; applied to arguments based on observation or experiment, as opposed to pure reason.

OriginLatin ex rērum nātūrā →
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Meanings

adverbex rerum natura (not comparable)
  1. not comparableFrom the nature of things; from the nature of the case; from nature; applied to arguments based on observation or experiment, as opposed to pure reason.

    Let us hear the Arguments that follow, which are taken, as he saith, ex rerum naturâ.

    1662 Thomas Salusbury, Galileo's Dialogue Concerning the Two Chief World Systems (Dialogue 2)

Origin

  1. Latinex rērum nātūrā“from the nature of things”
  2. Englishex rerum natura

Learned borrowing from Latin ex rērum nātūrā (“from the nature of things”).

More words from Latin

Full word history & related roots →
Cite this entry
APA

ex rerum natura. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/ex%20rerum%20natura

MLA

“ex rerum natura.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ex%20rerum%20natura. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “ex rerum natura,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/ex%20rerum%20natura.

Source: ex rerum natura on Wiktionary, CC BY-SA 4.0.