Indicatrix
Indicatrix may refer to:
Differential geometry[edit]
- 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[edit]
- Indicatrix, a special case of the index ellipsoid in the study of crystals and refractive indices
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