U+208B "₋" Subscript Minus Unicode Character

U+208B "₋" Subscript Minus is a typographic symbol designed for use in mathematical and scientific notations where a minus sign is required to appear in a subscript position, such as in chemical formulas like H₃O⁺ with a counterion or in numerical subscripts like a₋₂. It is part of the Superscripts and Subscripts block, standardized to ensure consistent rendering across different fonts and platforms, and it differs from the regular hyphen-minus or superscript minus signs because it is specifically positioned below the baseline to align with other subscript characters. This character helps maintain clarity in complex expressions where standard minus signs might be misinterpreted or disrupt the visual hierarchy of the notation.