- abnormal deposition or development of black or dark pigment in the tissues.
- a discoloration caused by this.
Origin of melanosis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for melanosis
In chronic cases the eventual effects are anaemia, melanosis, enlargement of the spleen and liver, and general cachexia.
He is stated to have died of "melanosis of the lungs," a disease in which the whole substance of the lungs turns completely black.Kalli, the Esquimaux Christian
Thomas Boyles Murray
- pathol a skin condition characterized by excessive deposits of melanin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for melanosis
1823, medical Latin, from Greek melanosis "a becoming black," from melanoun "to become black," from melas (genitive melanos); see melanin. Related: Melanotic.
Online Etymology Dictionary, © 2010 Douglas Harper
- Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism.melanism
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.