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indicatrix Line breaks: in¦di|ca¦trix
Pronunciation: /ˌɪndɪˈkeɪtrɪks/
(also optical indicatrix)

Definition of indicatrix in English:

noun (plural indicatrices ɪnˈdɪkətrɪsiːz)

An imaginary ellipsoidal surface whose axes represent the refractive indices of a crystal for light following different directions with respect to the crystal axes.
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.


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

Definition of indicatrix in:
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