Standard Lemma guide

prothrombinase

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.

No pronunciation record was provided for this word.

1

noun

Meaning 1

A complex that catalyzes the conversion of prothrombin to thrombin in the presence of calcium ions.

Definition source: English Wiktionary via Wiktextract

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

coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: factor X

Antonyms: none provided

Broader terms: coagulation factor, clotting factor

History

Etymology

From prothrombin + -ase.

Across languages

Translations

2 source translations are retained for this English entry.

  • Finnish: protrombinaasi — complex
  • Italian: protrombinasi — complex