melanosis

[ mel-uh-noh-sis ]

/ ˌmɛl əˈnoʊ sɪs /

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noun Pathology.

abnormal deposition or development of black or dark pigment in the tissues.

a discoloration caused by this.

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Origin of melanosis

First recorded in 1815–25; from New Latin, Late Greek melánōsis “a becoming black”; see melan-, -osis

Words nearby melanosis

melanocyte-stimulating hormone, melanoderm, melanoid, melanoma, melanophore, melanosis, melanosome, melanospermous, melanotic, melanotropin, melanous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use melanosis in a sentence

In chronic cases the eventual effects are anaemia, melanosis, enlargement of the spleen and liver, and general cachexia.
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 4|Various
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

British Dictionary definitions for melanosis

melanosis

melanism (ˈmɛləˌnɪzəm)

/ (ˌmɛləˈnəʊsɪs) /

noun

pathol a skin condition characterized by excessive deposits of melanin

Derived forms of melanosis

melanotic (ˌmɛləˈnɒtɪk), adjective

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