What to call the phenomenon where a rectangle is shown because a font is missing a glyph Is there a name to describe the situation where a particular character is shown on a computer screen in a particular font, but this font does not have a glyph for this particular character? Usually, the result looks like this: A kind of empty rectangle. Sometimes it shows the code for that character within the rectangle. !tofubake How do yo call this phenomenon in Japanese? If there is no name, is there a common term referring to this "missing glyph square" in Japanese? _(It is not. happens when character encoding meta-information is lost. It is not the problem here. Using a better font solves this phenomenon, but does not solve . Selecting a character encoding solves , but does not solve this phenomenon.)_

As far as Internet slang goes, the word {} is often used as a term for replacement glyphs because of their rectangular shapes, and []{} or []{} describe the phenomenon in one word.

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