Indices : Terminology : Overshoot

Applied to round characters and curved or rounded parts of characters which "over-shoot" a desired boundaries---typically the baseline and x-line--to compensate for the optical illusion of the curves under-shooting those boundaries. Most Os and lowercase bowl letters have an amount of overshoot in proportion to the plot of their curve. Tight curves require more overshoot than flattened and squared curves.

Discussions:
per-glyph overshoots?