Glossaries

1. 【同】k height
2. x-heightの最上部（mean line）からascenderの最上部（ascender line）までの高さ。

1. =k height
2. The height from the top of the x-height (mean line) to the top of the ascender (ascender line).

See k height.
 
Font Glossary - Fonts.com

書籍『Glossary of Typesetting Terms』のp.119「The Parts of a Letter」の図解。
 
Eckersley, Richard. Ellerston, Charles M. Hendel, Richard. Pascal, Naomi B. Scott, Anita Walker. Glossary of Typesetting Terms. The University of Chicago Press, 1995, 184p. (p.119)
Glossary of Typesetting Termsp.119の書影【Google Books】

The height the ascenders extend to.
 
Stuart, Henrik. Compositional Typeface Specification. 2006【PDF】

The distance between the top of the x-height and the tops of lowercase characters such as 'b', 'd', 'f', and 'k'. May be stated as the distance from the top of the BASELINE to the tops of the ASCENDERS.
 
Glossary of Terms | Font Factory（図解あり）

• ascender
• ascender-descender height
• ascender line
• ascent
• k height