Origin of I-bar

First recorded in 1885–90


  1. a rolled or extruded metal beam having a cross section resembling an I.Compare H-beam.

Origin of I-beam

First recorded in 1890–95
Also called I-bar [ahy-bahr] /ˈaɪˌbɑr/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for i-bar


  1. a rolled steel joist or a girder with a cross section in the form of a capital letter ICompare H-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