### Definition of Directrices

1. Noun. (plural of directrix) ¹

¹ Source: wiktionary.com

### Lexicographical Neighbors of Directrices

 directoratesdirectorialdirectoriallydirectoriesdirectorlessdirectorsdirectorshipdirectorshipsdirectorydirectoryless directourdirectoursdirectressdirectressesdirectricedirectrices (current term)directrixdirectrixesdirectsdireful direfullydirelydiremptdirempteddiremptingdiremptiondiremptionsdiremptsdirenessdirenesses

### Literary usage of Directrices

Below you will find example usage of this term as found in modern and/or classical literature:

1. Proceedings of the Royal Society of London by Royal Society (Great Britain) (1865)
"These axes, meeting themselves the axis of the congruency, are its directrices. A linear congruency, depending upon eight constants, is fully determined by ..."

2. The Elements of Descriptive Geometry: Shadows and Perspective. With a Brief by Samuel Edward Warren (1877)
"To construct tlie projections of a hyperbolic paraboloid, having given the directrices and plane director of one generation. In Space. ..."

3. The Elements of the Differential Calculus: Comprehending the General Theory by John Radford Young, Michael O'Shannessy (1833)
"Proceeding from the simpler kinds to the more general, we shall first examine the surfaces whose directrices are straight lines as well as the generatrices, ..."

4. Plane Analytic Geometry: With Introductory Chapters on the Differential Calculus by Maxime Bôcher (1915)
"Consequently, the equations of the two directrices of the ellipse or hyperbola are (1) *-±2. It will be seen that the more nearly circular the ellipse, ..."

5. Descriptive Geometry by Gardner Chace Anthony, George Francis Ashley (1909)
"Having given three curvilinear directrices and a point on one of them, it is required to determine the two projections of the element of the warped surface ..."

6. The Elements of the Differential Calculus; Comprehending the General Theory by John Radford Young, Michael O'Shannessy (1833)
"Proceeding from the simpler kinds to the more general, we shall first examine the surfaces whose directrices are straight lines as well as the generatrices, ..."

7. An Introduction to the Ancient and Modern Geometry of Conics: Being a by Charles Taylor (1881)
"In the Rectangular Hyperbola the " major" and minor foci and directrices are coincident. In the Circle the minor foci coincide with the centre and the minor ..."