positron
noun
pos·i·tron
ˈpä-zə-ˌträn 
: a positively charged particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of the electron
called also antielectron
Examples of positron in a Sentence
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Most antimatter particles created in particle accelerators have been fairly simple: anti-protons, positrons, anti-tritium and anti-helium — that sort of thing.
—
Keith Cooper, Space.com, 25 Dec. 2024
No material is more volatile than antimatter, which is made of particles of equal mass but opposite charge to normal matter, so things like anti-protons and positrons, which are the antimatter version of electrons.
—Keith Cooper, Space.com, 25 Dec. 2024
The study also used gold-standard amyloid positron emission tomography, or PET, scans to verify the presence of amyloid and tau in the brains of study participants, and magnetic resonance imaging, or MRI, to measure levels of visceral fat that occur when waistlines expand.
—Sandee Lamotte, CNN, 2 Dec. 2024
Researchers from Weill Cornell Medicine used positron emission tomography (PET) imaging to analyze estrogen activity in the brain.
—Jennifer Chesak, Verywell Health, 17 July 2024
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Keith Cooper, Space.com, 25 Dec. 2024
No material is more volatile than antimatter, which is made of particles of equal mass but opposite charge to normal matter, so things like anti-protons and positrons, which are the antimatter version of electrons.
—Keith Cooper, Space.com, 25 Dec. 2024
The study also used gold-standard amyloid positron emission tomography, or PET, scans to verify the presence of amyloid and tau in the brains of study participants, and magnetic resonance imaging, or MRI, to measure levels of visceral fat that occur when waistlines expand.
—Sandee Lamotte, CNN, 2 Dec. 2024
Researchers from Weill Cornell Medicine used positron emission tomography (PET) imaging to analyze estrogen activity in the brain.
—Jennifer Chesak, Verywell Health, 17 July 2024
See all Example Sentences for positron
Dictionary Entries Near positron
Cite this Entry
“Positron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/positron. Accessed 8 Feb. 2025.
Copy CitationKids Definition
positron
noun
pos·i·tron
ˈpäz-ə-ˌträn
: a positively charged particle having the same mass and size of charge as the electron
Medical Definition
positron
noun
pos·i·tron
ˈpäz-ə-ˌträn
: a positively charged particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of the electron
called also positive electron
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