directrixes
- plural of directrix.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The ellipse and hyperbola have each two foci, and two corresponding directrixes, and the parabola has one focus and one directrix.
From The Gutenberg Webster's Unabridged Dictionary Section F, G and H by Project Gutenberg
