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