Indicatrix
# Indicatrix

Indicatrix may refer to:

## Differential geometry

* Dupin indicatrix, a conic section which describes the local shape of a surface
* Tissot's indicatrix, which describes and visualizes the distortion of a map
* Tangent indicatrix, an object in differential geometry related to a closed space curve

## Optics

* Indicatrix, a special case of the index ellipsoid in the study of crystals and refractive indices
