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
Some of these natural compounds are even making their way into human medicine — like a molecule now in phase three clinical trials for treating glioblastoma, an aggressive brain cancer.
—
David L. Coddon, San Diego Union-Tribune, 22 Jan. 2026
Glassner was diagnosed with glioblastoma, a terminal brain cancer, in August 2023, and openly shared her diagnosis and treatment online with thousands of followers and listeners.
—Luke Chinman, PEOPLE, 16 Jan. 2026
Uche Ojeh died at age 45 in May of 2025 after being diagnosed with glioblastoma.
—Erin Jensen, USA Today, 14 Jan. 2026
Here are today's top stories: Diane Crump, the first female jockey to ride in the Kentucky Derby, died Jan. 1, according to a social media post from her family, after being diagnosed in late 2025 with glioblastoma, an aggressive brain cancer.
—Stephanie Stremplewski, Louisville Courier Journal, 3 Jan. 2026
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David L. Coddon, San Diego Union-Tribune, 22 Jan. 2026
Glassner was diagnosed with glioblastoma, a terminal brain cancer, in August 2023, and openly shared her diagnosis and treatment online with thousands of followers and listeners.
—Luke Chinman, PEOPLE, 16 Jan. 2026
Uche Ojeh died at age 45 in May of 2025 after being diagnosed with glioblastoma.
—Erin Jensen, USA Today, 14 Jan. 2026
Here are today's top stories: Diane Crump, the first female jockey to ride in the Kentucky Derby, died Jan. 1, according to a social media post from her family, after being diagnosed in late 2025 with glioblastoma, an aggressive brain cancer.
—Stephanie Stremplewski, Louisville Courier Journal, 3 Jan. 2026
See All Example Sentences for glioblastoma
Cite this Entry
“Glioblastoma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glioblastoma. Accessed 31 Jan. 2026.
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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