•
Electrical polarity, direction of electrical current •
Polarity (mutual inductance), the relationship between components such as transformer windings •
Polarity (projective geometry), in mathematics, a duality of order two •
Polarity in embryogenesis, the animal and vegetal poles within a blastula •
Cell polarity, differences in the shape, structure, and function of cells •
Chemical polarity, in chemistry, a separation of electric charge •
Magnetic polarity, north or south poles of a magnet •
Polar reciprocation, a concept in geometry also known as polarity •
Trilinear polarity, a concept in geometry of the triangle • Polarity of a
literal, in mathematical logic ==Humanities==