Bar – The horizontal stroke in characters such as A, H, R, e, and f.
Bowl – A curved stroke that creates an enclosed space within a character (space is then called a counter).
Cap Height – The height of capital letters from the baseline to the top of caps, most accurately measured on a character with a flat bottom (E, H, I, etc.).
Counter – The partially or fully enclosed space within a character.
Descender – The part of a character (g, j, p, q, y, and sometimes J) that descends below the baseline.