hy·​per·​pla·​sia | \ˌhī-pər-ˈplā-zh(ē-)ə \

Definition of hyperplasia 

: an abnormal or unusual increase in the elements composing a part (such as cells composing a tissue) — compare benign prostatic hyperplasia

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Other Words from hyperplasia

hyperplastic \ ˌhī-​pər-​ˈpla-​stik \ adjective

Examples of hyperplasia in a Sentence

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Endometrial hyperplasia: This condition happens when your endometrium becomes too thick, usually due to a lack of ovulation that results in insufficient progesterone production. Korin Miller, SELF, "How Long Does a Period Last, Normally?," 17 May 2018 Building up several months' worth of lining in your uterus can put you at risk for precancerous changes called hyperplasia. Sari Harrar, Good Housekeeping, "4 Perimenopause Period Symptoms That Could Be Serious," 23 Jan. 2013 Pastrana, who was born in Mexico in 1834, had two rare diseases: generalized hypertrichosis lanuginosa, which caused her face and body to be covered in hair, and gingival hyperplasia, which caused her lips and gums to grow thick. Deneen L. Brown, Washington Post, "‘The Bear Woman’: The brief, sad life of Julia Pastrana," 3 June 2018 During the surgery, county veterinarians found the dog suffering from vaginal hyperplasia and internal tissue damage to its abdomen wall, in addition to a severe infection inside the abdomen. Barbara Harvey, sacbee, "Who is ‘unprofessionally’ spaying, dumping dogs in Clarksburg area? | The Sacramento Bee," 13 Apr. 2018 Julia Pastrana, born in Mexico in 1834, had two rare diseases: hypertrichosis lanuginosa, which covered her body and face with hair, and gingival hyperplasia, which caused thickened lips and gums and the appearance of a protruding jaw. Marilyn Bailey, star-telegram, "A remarkable 19th-century woman gets a true champion in an interactive play about beauty | Fort Worth Star-Telegram," 21 Mar. 2018 Instead, her years of respiratory symptoms, chronic cough, and test results led us to diagnose a rare lung disease known as diffuse idiopathic pulmonary neuroendocrine cell hyperplasia. Jamie Garfield, Philly.com, "Medical Mystery: The cough that would not stop," 5 Feb. 2018 Often the cause is an enlarged prostate, a condition known as benign prostatic hyperplasia, or BPH. Robert J. Davis, Washington Post, "Better sex is just one reason that exercise can be so good for you," 17 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hyperplasia.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hyperplasia

1861, in the meaning defined above

History and Etymology for hyperplasia

New Latin

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Time Traveler for hyperplasia

The first known use of hyperplasia was in 1861

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hy·​per·​pla·​sia | \ˌhī-pər-ˈplā-zh(ē-)ə \

Medical Definition of hyperplasia 

: an abnormal or unusual increase in the elements composing a part (as cells composing a tissue) — see benign prostatic hyperplasia, congenital adrenal hyperplasia

Other Words from hyperplasia

hyperplastic \ -​ˈplas-​tik \ adjective
hyperplastically \ -​ti-​k(ə-​)lē \ adverb

More from Merriam-Webster on hyperplasia

Britannica English: Translation of hyperplasia for Arabic Speakers

Britannica.com: Encyclopedia article about hyperplasia

Comments on hyperplasia

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to clear from alleged fault or guilt

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