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 At age 34, he was diagnosed with glioblastoma, which carries with it a 15- to 18-month median survival time. Ryan Prior, CNN, "Creating your advance directive or living will during a pandemic," 7 May 2020 The type of tumor Peart had, glioblastoma, is a brain tumor that often recurs after it is initially treated. Li Cohen, CBS News, "Neil Peart, Rush drummer and lyricist, has died at age 67," 10 Jan. 2020 Gloria Rutty Berner ascended the stairway to heaven to rejoin her beloved parents on June 29, 2019 after a yearlong courageous battle against glioblastoma., "Gloria Rutty Berner," 10 July 2019 Though a cause has yet to be reported, a friend told Variety that Ryan was undergoing treatment for glioblastoma — an aggressive brain tumor that last year took the life of Sen. John McCain — after being diagnosed with it over the summer. Sophie Dodd,, "Remembering the Stars We Lost in 2019," 5 Dec. 2019 Randy Tenney, 65, passed away after a months-long battle with glioblastoma, a rare brain cancer. Gerren Keith Gaynor, Fox News, "Arizona widow gets final Valentine's Day gift from husband months after his death," 16 Feb. 2020 Last year early clinical results showed that these SNAs also reach glioblastoma cells in human patients. Scientific American, "The Power of Spheres," 25 Dec. 2019 The therapy targets Glioblastoma multiforme, also known as GBM or glioblastoma, a fast-growing brain tumor that typically results in death within the first 15 months after diagnosis. William Thornton |, al, "Incysus begins trial of brain cancer immunotherapy," 28 Feb. 2020 Corey has glioblastoma, an incurable brain tumor, and is on home hospice. Steve Hartman, CBS News, "Man with an incurable brain tumor finally marries his longtime love," 14 Feb. 2020

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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Time Traveler for glioblastoma

Time Traveler

The first known use of glioblastoma was circa 1923

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Cite this Entry

“Glioblastoma.” Dictionary, Merriam-Webster, Accessed 9 Aug. 2020.

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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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