Standard Lemma guide

rennin

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

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  • /ˈɹɛ.nɪn/
  • rhymes with -ɛnɪn

1

noun

Meaning 1

A proteolytic enzyme, obtained from the gastric juice of the abomasum of calves, used to coagulate milk and make cheese.

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

an enzyme that occurs in gastric juice; causes milk to coagulate

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: chymosin

Antonyms: none provided

Broader terms: enzyme, coagulase

History

Etymology

Etymology tree English rennet Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English rennin From rennet + -in.

Across languages

Translations

6 source translations are retained for this English entry.

  • Finnish: renniini — enzyme
  • French: chymosine — enzyme
  • Galician: quimosina — enzyme
  • Italian: chimosina — enzyme
  • Spanish: quimosina — enzyme
  • Spanish: rennina — enzyme