|Dirac's constant (dĭ-rāks') Pronunciation Key
A physical constant often used in quantum mechanics in place of Planck's constant, equal to h/2π , where h equals Planck's constant. Its symbol is [[[hbar.gif]]]. Also called h-bar.
|a chattering or flighty, light-headed person.|
|the offspring of a zebra and a donkey.|
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