The mglyph element provides a mechanism for displaying images to represent non-standard symbols. It may be used within the content of the token elements mi, mn, mo, mtext or ms where existing Unicode characters are not adequate. MathML Fundamentals
<math> <mspace linebreak="newline" indentalign="center"></mspace> <mtext style="border:1px;" mathsize="50">Glyph - gif, jpg, png, transparent, align, width, rtl</mtext> <mspace linebreak="newline" indentalign="center"></mspace> <mrow style="border:1px;"> <mtext style="border:1px;">ag<mglyph style="border:1px;" mathbackground="red" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.gif"/><mglyph style="border:1px;" mathbackground="red" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/transp.png" width="100"/>bbGG</mtext> </mrow> <mspace linebreak="newline" indentalign="center"></mspace> <mrow style="border:1px;"> <mtext style="border:1px;" dir="rtl">ag<mglyph style="border:1px;" mathbackground="red" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.gif"/><mglyph style="border:1px;" mathbackground="red" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/transp.png" width="100"/>bbGG</mtext> </mrow> <mspace linebreak="newline" indentalign="center"></mspace> <mrow style="border:1px;"> <mtext>jpg:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.jpg" width="100" valign="-10"/></mtext> <mtext>base:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.png" width="100"/></mtext> <mtext>png:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.png" width="100" valign="10"/></mtext> <mtext>gif:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.gif" width="100"/></mtext> <mtext>transp:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/transp.png" width="100"/></mtext> <mtext>dim:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/transp.png" width="50" height="100"/></mtext> </mrow> <mspace linebreak="newline" indentalign="center"></mspace> <mrow style="border:1px;"> <mi>mg:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.png" height="100"/></mi> <mi style="border:1px;">X</mi> <mn>2.34</mn> <mi>XX</mi> <ms>"M"ms:<mglyph src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/transp.png"/>ms</ms> </mrow> <mspace linebreak="newline" indentalign="center"></mspace> <mrow style="border:1px;" dir='rtl'> <mi>mg:<mglyph style="border:1px;" src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/glyph1.png" height="100"/></mi> <mi style="border:1px;">X</mi> <mn>2.34</mn> <mi>XX</mi> <ms>"M"ms:<mglyph src="http://math-on-web.com/FMath-Chrome-Extension/test/glyphs/transp.png"/>ms</ms> </mrow> </math>