gynecomastia
noun
gy·neco·mas·tia
ˌgī-nə-kō-ˈma-stē-ə 
: excessive development of the breast in the male
Examples of gynecomastia in a Sentence
Recent Examples on the Web
At the medical center, a physician dismissed the symptoms as a reaction to the steroid medication she had been prescribed, misdiagnosing her with gynecomastia, a condition typically seen in men who use anabolic steroids, Sutherland’s lawyers said in a report.
—
Vanessa Etienne, PEOPLE, 3 Nov. 2025
In older men, as testosterone naturally declines, gynecomastia becomes more common, often combined with weight gain or medications that alter hormone levels.
—Dr. Jamin Brahmbhatt, CNN Money, 26 Oct. 2025
However, the most common cause of puffy nipples is related to hormone imbalances, specifically a condition known as gynecomastia.
—Sherri Gordon, Health, 21 Sep. 2025
The human body can respond to these naturally occurring hormonal differences in a variety of ways; for example, during male puberty, many kids will have a temporary enlargement of their breast tissue, known as pubertal gynecomastia, in response to swelling hormones.
—Bethany Brookshire, Scientific American, 1 Oct. 2024
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Vanessa Etienne, PEOPLE, 3 Nov. 2025
In older men, as testosterone naturally declines, gynecomastia becomes more common, often combined with weight gain or medications that alter hormone levels.
—Dr. Jamin Brahmbhatt, CNN Money, 26 Oct. 2025
However, the most common cause of puffy nipples is related to hormone imbalances, specifically a condition known as gynecomastia.
—Sherri Gordon, Health, 21 Sep. 2025
The human body can respond to these naturally occurring hormonal differences in a variety of ways; for example, during male puberty, many kids will have a temporary enlargement of their breast tissue, known as pubertal gynecomastia, in response to swelling hormones.
—Bethany Brookshire, Scientific American, 1 Oct. 2024
See All Example Sentences for gynecomastia
Cite this Entry
“Gynecomastia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gynecomastia. Accessed 8 Nov. 2025.
Copy CitationMedical Definition
gynecomastia
noun
gy·ne·co·mas·tia
variants
or chiefly British gynaecomastia
: excessive development of the breast in the male
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