释义 |
helm·holtz coil \ˈhel]mˌhōlts, ˈheu̇]\ noun Usage: usually capitalized H Etymology: after Hermann L.F. von Helmholtz died 1894 German physicist : one of two equal parallel coaxial circular coils in series that are separated from each other by a distance equal to the radius of one coil for producing an approximately uniform magnetic field in the space between the coils |