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- noun Plural form of
Sorry, no etymologies found.
Among the exotic objects they will be looking for are bizarre balls of energy that behave like particles known as "glueballs".
There's lots more in the field (or not in it), such as techniquarks, glueballs, and ghosts (which are not really there).
I’m not up to date on the current situation regarding quark-gluon plasma, glueballs or whatever.