# melanosis

> English word · Noun

## Definitions
1. The morbid deposition of black matter, often of a malignant character, causing pigmented tumours.
2. A pigmentation of tissue.
3. Synonym of nigredo.

## Etymology
From melano- + -osis.

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