Hash. Pound. Number. Octothorpe. Grid. Crunch. Diamond. Sharp. Mesh. Crosshatch. Thud. Thump. Splat. Scratchmark. Square. Hex. Flash. Tic-tac-toe. Pig-pen.
The host of names the “#” symbol has had over the centuries only just outnumbers the plethora of functions it has fulfilled. From when the Latin for “pound” began being written as “lb” (short for libra) with a line through the top, to the creation of millions of hashtags a day on Twitter, it has had a colourful history.
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