glioblastoma
noun
glio·blas·to·ma
ˌglī-ō-ˌbla-ˈstō-mə 
variants
or less commonly glioblastoma multiforme
plural glioblastomas also glioblastomata
ˌglī-ō-ˌbla-ˈstō-mə-tə
or glioblastomas multiforme or glioblastoma multiformes
or glioblastomas multiforme or glioblastoma multiformes
: 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
Bolton — who has had his speech, mobility and short-term memory affected by his chemotherapy and radiation treatments — first revealed his glioblastoma diagnosis to PEOPLE in a cover story in April.
—
Rachel Desantis, PEOPLE, 22 Dec. 2025
The 72-year-old two-time Grammy Award winner previously revealed that he was diagnosed with glioblastoma in December 2023 after undergoing emergency surgery that resulted in doctors removing Bolton’s brain tumor in its entirety.
—Ashley Hume, FOXNews.com, 22 Dec. 2025
Kinsella, whose real name was Madeleine Wickham, had been diagnosed with glioblastoma, an aggressive form of brain cancer, in late 2022.
—CBS News, 10 Dec. 2025
Wickham was diagnosed with glioblastoma in 2022 and told her fans about her diagnosis and treatments for the aggressive form of brain cancer in 2024.
—Rebecca Alter, Vulture, 10 Dec. 2025
See All Example Sentences for glioblastoma
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Rachel Desantis, PEOPLE, 22 Dec. 2025
The 72-year-old two-time Grammy Award winner previously revealed that he was diagnosed with glioblastoma in December 2023 after undergoing emergency surgery that resulted in doctors removing Bolton’s brain tumor in its entirety.
—Ashley Hume, FOXNews.com, 22 Dec. 2025
Kinsella, whose real name was Madeleine Wickham, had been diagnosed with glioblastoma, an aggressive form of brain cancer, in late 2022.
—CBS News, 10 Dec. 2025
Wickham was diagnosed with glioblastoma in 2022 and told her fans about her diagnosis and treatments for the aggressive form of brain cancer in 2024.
—Rebecca Alter, Vulture, 10 Dec. 2025
See All Example Sentences for glioblastoma
Cite this Entry
“Glioblastoma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glioblastoma. Accessed 23 Dec. 2025.
Copy CitationMedical Definition
glioblastoma
noun
glio·blas·to·ma
ˌglī-(ˌ)ō-bla-ˈstō-mə
plural glioblastomas also glioblastomata
-mət-ə
: 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
Greg Miller, Sciencecalled also glioblastoma multiforme
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