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Definition of I-beam
1. Noun. Girder having a cross section resembling the letter 'I'. 
Generic synonyms: Girder
Definition of I-beam
1. Noun. (engineering) A beam shaped like a capital letter I (with serifs top and bottom), used in construction. ¹
2. Noun. (computing graphical user interface) A cursor shaped like the letter I, usually indicating the presence of editable text. ¹
¹ Source: wiktionary.com



