noun
electric dipole
Physics term for a pair of equal and opposite electric charges separated by a small distance.
水分子は電気双極子を持つ。
A water molecule has an electric dipole.
Magnetic dipole, analogous to electric dipole but for magnetic poles.
Compound of 電気 (electricity) + 双極子 (dipole). 双極子 itself is from 双 (pair) + 極 (pole) + 子 (small object).