h-bar


Also found in: Dictionary, Medical, Wikipedia.

h-bar

[′āch ‚bär]
(quantum mechanics)
A fundamental constant equal to h /2π, where h is Planck's constant. Symbolized ℏ. Also known as Dirac h; h-line.

H-bar

A steel bar shaped like an H; used in structural systems; one form of main runner in a suspended acoustical ceiling.
References in periodicals archive ?
In addition, H-bar markings will be put down outside any homes where the owners want them, in a bid to prevent parents from parking across driveways.
Bits of rock from the Moon and Mars together with a variety of terrestrial mineral samples spin on the ends of a fully articulated H-bar, all of whose parts are also turning independently.
There are similar products on the market, the most prominent competitors being Broadfoot Publishing and H-Bar Enterprises, but they sell for hundreds of dollars more than the Guild Press version.