# vitamin K

> English word · Noun

## Definitions
1. Any of several related fat-soluble vitamins, found in leafy green vegetables, essential for blood clotting.
2. The drug ketamine.

## Etymology
Named similarly to the other vitamins, that are named after their order of discovery. This one was assigned its "K" from Danish koagulation by the Danish researcher Henrik Dam.

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