# perforin

> English word · Noun

## Definitions
1. A cytolytic protein found in natural killer cells.

## Etymology
From perforate + -in, alluding to its action on the cell membrane.

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