(military) A line drawn on a map or chart connecting all points at which the magnetic inclination (dip) is zero for a specified epoch.

(physics) A minor stable isotope of magnesium, ²⁶₁₂Mg, having twelve protons and fourteen neutrons; it amounts to about 11% of the element in nature

(physics) The major stable isotope of magnesium, ²⁴₁₂Mg, having twelve protons and twelve neutrons; it amounts to about 79% of the element in nature

(physics) A minor stable isotope of magnesium, ²⁵₁₂Mg, having twelve protons and thirteen neutrons; it amounts to about 10% of the element in nature

(chemistry) A fine white powder, MgO₂, used as a bleach and disinfectant

(physics) The potential energy of a magnetic field.

A sword, usually from mythology or fiction, imbued with magical power to increase its strength or grant it other supernatural qualities.

plural of magic sword

A magazine made with inexpensive paper and printing, containing shocking or sensationalist text fiction by low-paid writers.

Fluid rock material of basaltic origin