[ mel-uh-noh-sis ]
/ ˌmɛl əˈnoʊ sɪs /

noun Pathology.

abnormal deposition or development of black or dark pigment in the tissues.
a discoloration caused by this.

Origin of melanosis

1815–25; < New Latin < Late Greek melánōsis a becoming black. See melan-, -osis Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for melanosis

British Dictionary definitions for melanosis


melanism (ˈmɛləˌnɪzəm)

/ (ˌmɛləˈnəʊsɪs) /


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

Medicine definitions for melanosis

[ mĕl′ə-nōsĭs ]


Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism.melanism

Other words from melanosis

mel′a•notic (-nŏtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.