I-beam definitions

ī'bēm'
A steel joist or girder with short flanges and a cross section formed like the letter I.
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A steel beam which in cross section has the shape of an I.
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(engineering) A beam shaped like a capital letter I (with serifs top and bottom), used in construction.
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(computing, graphical user interface) A cursor shaped like the letter I, usually indicating the presence of editable text.
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