单词	directrix
释义	Directrix A line used to help define a shape. Example: a parabola can be defined as a curve where any point is at an equal distance from the directrix (a line) and the focus (a point). See: Parabola
随便看	angle of elevation annual annual percentage rate (apr) annual percentage yield (apy) annulus anticlockwise antiprism apex apothem approximation arc arc length area argand diagram argument arithmetic arithmetic mean arithmetic progression arithmetic sequence arm of an angle array ascending order asset associative law asymmetry

数学辞典收录了1200条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。