ter·​a·​to·​ma | \ ˌter-ə-ˈtō-mə How to pronounce teratoma (audio) \
plural teratomas also teratomata\ ˌter-​ə-​ˈtō-​mə-​tə How to pronounce teratoma (audio) \

Definition of teratoma

: a tumor made up of a heterogeneous mixture of tissues

Examples of teratoma in a Sentence

Recent Examples on the Web But the results include some frightening growths, called teratomas, that are rare among human fetuses: about 1 in 30,000 babies is born with a teratoma. Caroline Delbert, Popular Mechanics, 26 Jan. 2022 In an advance reported in the New York Times in 1979, Dr. Mintz showed that the cells of a particular kind of tumor, called a teratoma, could be inserted into a normal blastocyst, or early embryo, of a mouse. Emily Langer, Washington Post, 14 Jan. 2022 While Wan takes wild liberties with medical facts for his film, the director reveals that real-life teratoma cases did inspire the movie, whose story is credited to Wan; his wife, Ingrid Bisu; and Malignant screenwriter Akela Cooper. Clark Collis, EW.com, 15 Sep. 2021 The teratoma was surgically removed and sent for testing. Sarah Lemire, Health.com, 25 June 2021 Despite the severe immune reaction that can accompany a teratoma, the tumors are typically benign. Sarah Lemire, Health.com, 25 June 2021 Dermoid cysts are the non-cancerous form of a type of tumor called a teratoma, according to the National Cancer Institute (NCI). Carolyn L. Todd, SELF, 15 Jan. 2019 LynLee suffered from a sacrococcygeal teratoma, a tumor that develops in utero and grows from the baby's tailbone. Sarah Schreiber, Good Housekeeping, 21 Oct. 2016 And germ cell growths are usually benign tumors called mature teratomas, the ACS explains. Korin Miller, SELF, 1 Nov. 2018 See More

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

First Known Use of teratoma

1879, in the meaning defined above

History and Etymology for teratoma

borrowed from German Teratom, from Greek terat-, téras "sign sent by the gods, portent, marvel, monster" + German -om -oma — more at terato-

Note: Term probably introduced by the German pathologist Rudolf virchow, no later than 1866, when it appears in the article "Ein tiefes auriculares Dermoid des Halses," Archiv für pathologische Anatomie und Physiologie und für klinische Medicin (Virchows Archiv), Band 53, p. 210.

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The first known use of teratoma was in 1879

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Cite this Entry

“Teratoma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/teratoma. Accessed 26 May. 2022.

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More Definitions for teratoma


ter·​a·​to·​ma | \ ˌter-ə-ˈtō-mə How to pronounce teratoma (audio) \
plural teratomas also teratomata\ -​mət-​ə How to pronounce teratoma (audio) \

Medical Definition of teratoma

: a tumor derived from more than one embryonic layer and made up of a heterogeneous mixture of tissues (as epithelium, bone, cartilage, or muscle)

Other Words from teratoma

teratomatous \ -​mət-​əs How to pronounce teratoma (audio) \ adjective

More from Merriam-Webster on teratoma

Britannica.com: Encyclopedia article about teratoma


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