noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A process of putrefaction or decomposition, one of the four major stages of the alchemical magnum opus. uncountable
2. 2
   A term in Jungian psychology referring to mental negativity. uncountable

Synonyms

All synonyms

melanosis

Etymology

From Latin nigrēdō (“blackness”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.