Block: Combining Diacritical Marks for Symbols

Range U+20D0 - U+20FF
Official Chart http://www.unicode.org/charts/PDF/U20D0.pdf
Wikipedia Combining Diacritical Marks for Symbols is a Unicode block containing arrows, dots, enclosures, and overlays for modifying symbol characters.
https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols
Characters