latus rectum

短语

n. 正焦弦正焦弦

发音

US

词形变化

latera recta 复数 latera recta latus rectums latus rectums 复数

释义与例句

n.
  1. 1.

    The line drawn through a focus of a conic section parallel to the directrix and terminated both ways by the curve. It is the parameter of the principal axis.

    数学

词源

Latin latus (“side”) + rectum (“right”)

来源：wiktionary