A drawing or diagram that represents or illustrates something; an instrument used for reproducing or transferring diagrams.
From Greek dia- (through) + graphein (to write/draw), literally 'a writing or drawing through.' Related to other -graph words like telegraph and paragraph.
A diagraph is to diagrams what a telegraph is to messages—a tool for transmitting or reproducing information across distance or medium. This prefix di- or dia- appears in hundreds of English words where it means 'across' or 'through,' revealing English's deep Greek roots.
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