directrix
[ dih-rek-triks, dahy- ]
/ dɪˈrɛk trɪks, daɪ- /
noun, plural di·rec·trix·es, di·rec·tri·ces [dih-rek-tri-seez, dahy-, dahy-rek-trahy-seez] /dɪˈrɛk trɪˌsiz, daɪ-, ˌdaɪ rɛkˈtraɪ siz/.
Geometry.
a fixed line used in the description of a curve or surface.
Archaic.
a directress.
usage note for directrix
See
-trix.
Words nearby directrix
directorate,
directorial,
directory,
directory assistance,
directress,
directrix,
diredawa,
direful,
diremption,
direxit,
dirge
Example sentences from the Web for directrix
British Dictionary definitions for directrix
directrix
/ (dɪˈrɛktrɪks, daɪ-) /
noun
geometry
a fixed reference line, situated on the convex side of a conic section, that is used when defining or calculating its eccentricity
a directress
Word Origin for directrix
C17: New Latin, feminine of
director
Scientific definitions for directrix
directrix
[ dĭ-rĕk′trĭks ]
A straight line used in generating a curve such as a parabola.