aperture-Opening at the end of an open counter

arm-A horizontal stroke not connected on one or both ends.

asender-An upward vertical stroke found on lowercase letters that extends above the typeface’s x-height.

baseline-The invisible line where letters sit.

bowl-A curved stroke that encloses a letter’s counter

counter-Fully or partially enclosed space within a letter

crossbar-A horizontal stroke

descender-A downward vertical stroke found on lowercase letters that extends below the baseline.

diagonal stroke-An angled stroke

ear-A small stroke projecting from the upper right bowl of some lowercase g’s.

hairlinr-The thin strokes of a serif typeface.

link -A stroke that connects the top and bottom bowls of lowercase double-story g’s.

loop-The enclosed or partially enclosed counter below the baseline of a double-story g.

lowercase-The smaller form of letters in a typeface.

serif-“Feet” or non-structural details at the ends of some strokes.

shoulder-A curved stroke originating from a stem.

spine-The main curved stroke for a capital and lowercase s.

spur-A small projection from a curved stroke.

stem-Primary vertical stroke.

tail-A descending stroke, often decorative

terminal-The end of a stroke that lacks a serif.

x-height-The height of the main body of a lowercase letter.