1. 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.

2. X-height: The height of lowercase letters, specifically the lowercase x, not including ascenders and descenders.

3. Baseline: The invisible line on which most characters sit.

1. Descender: The part of a character (g, j, p, q, y and sometimes J) that descends below the baseline.

2. Ear: The small stroke that projects from the top of the lowercase g.

3. Serif: The projection extending off the main strokes of the characters of serif typefaces. Serifs come in two styles: bracketed and unbracketed. Brackets are the supportive curves, which connect the serif to the stroke, creating a somewhat softer look. Unbracketed serifs are attached sharply, and usually at 90-degree angles.

4. Spur: A small projection off a main stroke found on many capital G's.

5. Swash: A fancy flourish replacing a terminal or serif.

6. Tail: The descender of a Q or short diagonal stroke in a letter.

7. Terminal: The end of a stroke not terminated with a serif.

1. Bowl: A curved stroke which creates an enclosed space within a character (which is then called a counter).

2. Counter: The partially or fully enclosed space within a character.

3. Link: A very thin stroke that connects the top and bottom part (bowl and loop) of a two-story lowercase g.

4. Loop: The lower portion of the lowercase g.

5. Shoulder: The curved stroke of the h, m, n.

6. Spine: The main curved stroke of the S.

7. Stress: The direction of thickening in a curved stroke.

1. Arm: A horizontal stroke that is attached on one end and free on the other.

2. Ascender: The part of a lowercase character (b, d, f ,h, k, l, t) that extends above the height of the lowercase x.

3. Bar: The horizontal stroke in characters such as the A, H, e, f.

4. Hairline: A very thin stroke most often common on serif typefaces.

5. Stem: A straight vertical stroke or main straight diagonal stroke in a letter which has no verticals.

6. Stroke: A straight or curved line.