A term used to describe a material, like aluminum, that is unaffected by magnetic fields. It is the opposite of ferromagnetic, which refers to materials like iron that are influenced by magnetic fields.
person: "I tried sticking a magnet to this aluminum plate, but it didn't budge at all."
Mehdi: "Well, that's because aluminum is alumagnetic—it doesn't get affected by magnetic fields like iron does."
"Alumagnetic" describes a metal as "having a low susceptibility to magnetization, just as aluminium".
It is the opposite of "ferromagnetic", which describes a metal as "having a high susceptibility to magnetization, just as iron".
"This can of Coke must be made of something alumagnetic since I can't seem to pick it up with a magnet"