H-beam

[eych-beem]
Also called H-bar [eych-bahr] /ˈeɪtʃˌbɑr/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for h-bar

H-beam

noun
  1. a rolled steel joist or girder with a cross section in the form of a capital letter HCompare I-beam
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

h-bar in Science

h-bar

[āchbär′]
  1. See Dirac's constant.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.