1. a small, discrete mass of plasma, especially one that forms in a magnetic field or during a plasma discharge
Usage: physics; technical
2. a structure or organism resembling plasma or having plasma-like properties
Usage: biology; rare

Examples

• Researchers observed plasmoids forming in the laboratory plasma experiment.
• The magnetic field confined the plasmoid within the reactor.
• Solar flares can produce plasmoids that interact with Earth's magnetosphere.
• The plasmoid exhibited unexpected stability during the high-energy collision.
• Scientists study plasmoids to better understand fusion energy processes.