glio·​blas·​to·​ma | \ ˌglī-ō-ˌbla-ˈstō-mə How to pronounce glioblastoma (audio) \
variants: or less commonly glioblastoma multiforme \ -​ˌməlt-​ə-​ˈfȯrm-​ē How to pronounce glioblastoma multiforme (audio) \
plural glioblastomas also glioblastomata\ ˌglī-​ō-​ˌbla-​ˈstō-​mə-​tə How to pronounce glioblastomata (audio) \ or glioblastomas multiforme or glioblastoma multiformes

Definition of glioblastoma

: a malignant rapidly growing astrocytoma of the central nervous system and usually of a cerebral hemisphere

Examples of glioblastoma in a Sentence

Recent Examples on the Web

His friend Scott Patrick was diagnosed with glioblastoma, a deadly brain cancer, and asked Kline to run the race to raise money for cancer research. Danielle Garrand, CBS News, "This man wanted to share his love of running with people who have disabilities. Now, he's finished 45 marathons with them.," 26 June 2019 While reading about Senator John McCain, who had been diagnosed with glioblastoma (an aggressive form of brain cancer), she was struck by the lack of progress toward a cure. Samantha Leach, Glamour, "Meet Glamour's 2019 College Women of the Year," 11 June 2019 The most common is glioblastoma, an aggressive brain cancer that invades normal brain tissue. Trihealth,, "Advancing care for brain cancer," 4 June 2019 Breakefield, who received one of the grants, is examining how RNA released by glioblastoma, a highly aggressive form of brain cancer, manipulates surrounding cells to support its own growth. Quanta Magazine, "RNA’s Secret Life Outside the Cell," 8 Nov. 2013 The Mayo Clinic Hospital in Phoenix last summer said that the original blood clot was associated with a primary brain tumor, known as a glioblastoma. Brooke Singman, Fox News, "John McCain to discontinue medical treatment for brain cancer," 24 Aug. 2018 The six-term senator has been battling a deadly form of brain cancer known as glioblastoma and has been in Arizona since Dec. 17. Bree Burkitt, USA TODAY, "Sen. John McCain tweets birthday wish to wife, Cindy," 20 May 2018 Getty Images Senator John McCain has been diagnosed with brain cancer after an operation to remove a blood clot from his eye revealed a glioblastoma. Mehera Bonner, Marie Claire, "Meghan McCain Releases Emotional Tribute to Her Dad Following His Cancer Diagnosis," 20 July 2017 McCain, 81, has been absent from the Senate since he was diagnosed with glioblastoma last July. Bree Burkitt, azcentral, "Sen. John McCain in physical therapy, former staffer says," 1 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glioblastoma.' 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 glioblastoma

circa 1923, in the meaning defined above

History and Etymology for glioblastoma

New Latin, from glia glia + blast- + -oma

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Dictionary Entries near glioblastoma


glint o' gold






Statistics for glioblastoma

Last Updated

17 Jul 2019

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Time Traveler for glioblastoma

The first known use of glioblastoma was circa 1923

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More Definitions for glioblastoma


glio·​blas·​to·​ma | \ ˌglī-(ˌ)ō-bla-ˈstō-mə How to pronounce glioblastoma (audio) \
plural glioblastomas also glioblastomata\ -​mət-​ə How to pronounce glioblastomata (audio) \

Medical Definition of glioblastoma

: a malignant rapidly growing astrocytoma of the central nervous system and usually of a cerebral hemisphere Glioblastoma is the worst grade of malignant glioma, a relatively uncommon but deadly class of brain tumors that kills 97% of those diagnosed within 5 years.— Greg Miller, Science, 2 Jan. 2009

called also glioblastoma multiforme

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