noun
character base vector
Technical computing term referring to the base direction vector of a character in text layout or font rendering.
文字基準方向は、フォントの描画において文字の向きを決めるために使われる。
The character base vector is used to determine the orientation of characters in font rendering.
Compound of 文字 (character), 基準 (standard/base), and 方向 (direction). The exact origin is uncertain; it is a technical term likely coined in computing contexts.