# thrombin

> English word · Noun · IPA /ˈθɹɒmbɪn/ · frequency rank #83,815

## Definitions
1. An enzyme in blood that facilitates blood clotting by converting fibrinogen to fibrin (by means of ionized calcium).

## Etymology
From thromb- + -in.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/thrombin