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A fundamental constant equal to h /2π, where h is Planck's constant. Symbolized ℏ. Also known as Dirac h; h-line.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A steel bar shaped like an H; used in structural systems; one form of main runner in a suspended acoustical ceiling.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.