# thromboplastin

> English word · Noun

## Definitions
1. A protease that converts prothrombin to thrombin during the clotting of blood.

## Etymology
From thrombo- + plastin.

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