# penicillium

> English word · Noun · frequency rank #73,517

## Definitions
1. Any of the blue-green fungi, of the genus Penicillium, that are used in the manufacture of cheeses, and are an important source of antibiotics.

## Etymology
From the genus name.

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