noun
character up vector
Technical term in computing, referring to the direction a character faces upward in a coordinate system or rendering context.
フォントの文字立ち上がり方向を設定する。
Set the character up vector of the font.
Compound of 文字 (character), 立ち上がり (rising, from 立ち上がる), and 方向 (direction). The exact derivation is uncertain; the term is a technical calque or coined phrase in computing contexts.