Standard Lemma guide

renin

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /ˈɹiː.nɪn/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • US: /ˈɹi.nɪn/
  • US: /ˈɹɛ.nɪn/
  • CMU ARPABET: R IY1 N AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A circulating enzyme released by mammalian kidneys that converts angiotensinogen to angiotensin I. Due to its activity which ultimately leads to the formation of angiotensin II and aldosterone, this hormone plays a role in maintaining blood pressure.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a proteolytic enzyme secreted by the kidneys; catalyzes the formation of angiotensin and thus affects blood pressure

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: protease, peptidase, proteinase, proteolytic enzyme

History

Etymology

From reno- + -in.

Across languages

Translations

4 source translations are retained for this English entry.

  • Finnish: reniini — enzyme
  • Italian: renina — enzyme
  • Spanish: renina — enzyme
  • Turkish: renin — enzyme