noun Pathology.
an abnormally abundant flow of milk in a lactating woman.
secretion of milk from the breast of a nonlactating person.
Also, galactorrhoea.

1850–55; galacto- + -rrhea Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

galactorrhea ga·lac·tor·rhe·a (gə-lāk'tə-rē'ə)

  1. A continued discharge of milk from the breasts between intervals of nursing or after weaning. Also called lactorrhea.

  2. Excessive flow of milk during lactation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


excessive flow of milk from the breast, or lactation that is not associated with childbirth or nursing. The abnormal production of milk in women is usually due to excessive levels of estrogen in the body or to excessive production of prolactin, a hormone that is manufactured by the pituitary gland and that stimulates the production of milk. Galactorrhea may also be caused by a tumour or other disorder occurring in the pituitary gland. The milk of a nursing mother who has galactorrhea may be watery, whitish green in colour, and of poor quality

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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