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[en-doh-mee-tree-oh-sis] /ˌɛn doʊˌmi triˈoʊ sɪs/
noun, Pathology
the presence of uterine lining in other pelvic organs, especially the ovaries, characterized by cyst formation, adhesions, and menstrual pains.
Origin of endometriosis
1920-25; < New Latin; see endometrium, -osis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for endometriosis
  • Most of the time, endometriosis can be removed during the surgery.
  • Other common reasons for hysterectomy include endometriosis, or growth of tissue outside the uterus, and pelvic pain.
  • Secondary dysmenorrhea means painful periods due to an underlying illness, such as endometriosis and pelvic inflammatory disease.
British Dictionary definitions for endometriosis


(pathol) the presence of endometrium in areas other than the lining of the uterus, as on the ovaries, resulting in premenstrual pain
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
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endometriosis in Medicine

endometriosis en·do·me·tri·o·sis (ěn'dō-mē'trē-ō'sĭs)
A condition, usually resulting in pain and dysmenorrhea, characterized by the abnormal presence of functional endometrial tissue outside the uterus, frequently as cysts containing altered blood.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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endometriosis in Science
A gynecologic disorder characterized by the abnormal presence of functional endometrial tissue outside the uterus, often resulting in pelvic pain and dysmenorrhea.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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