Definition of "coreless" []

• Lacking a core (adjective)

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• "Say you're planning a dinner party, an important institution for binding people together in this coreless city."
• "The only issue with this method is that the wire, and permeable material used to hold the magnetic field take up a large surface area (even a “flat” induction device like this is big and heavy), that is, if the coupling is done at the standare rate of 60hz (here in the US), but at higher frequencies you use the equivalent of a “coreless transformer”, and that indeed is light."
• "The phenomenon called “coreless winter” in the antarctic demonstrates a radiative equilibruim during winter with downwelling radiation."