Definition of indicatrix in English:

indicatrix

Syllabification: in·dic·a·trix
Pronunciation: /ˈindiˌkātriks, inˈdikə-
 
/
(also optical indicatrix)

noun (plural indicatrices /-triˌsēz/)

Crystallography
An imaginary ellipsoidal surface whose axes represent the refractive indices of a crystal for light following different directions with respect to the crystal axes.
More example sentences
  • Other contributions to differential geometry which occur in this work include his invention of the ‘Dupin indicatrix’ which gives an indication of the local behaviour of a surface up to the terms of degree two.

Origin

late 19th century: modern Latin, feminine of Latin indicator 'something that points out'.

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