anisotropic
/,ænaisə'trɔpik/
Học thuậtThân thiện
Definition
- Adjective:
- Having properties that differ depending on the direction of measurement: A material or physical property is described as anisotropic if its measured value changes when the direction of measurement or observation changes. This contrasts with isotropic properties, which are identical in all directions.
Usage
- The term "anisotropic" is primarily used in scientific and technical contexts, especially in physics, materials science, geology, and engineering.
- It describes substances, fields, or systems where physical traits like strength, conductivity, or refractive index are direction-dependent.
- It is often used to contrast with "isotropic."
Examples
- Adjective:
- Wood is an anisotropic material; it is much stronger along the grain than across it.
- The crystal's anisotropic optical properties cause it to split light into two rays.
- Magnetic fields in certain materials can be highly anisotropic.
Advanced Usage
- "Anisotropic etching": A microfabrication process that etches a material at different rates in different directions.
- Anisotropic etching is crucial for creating precise vertical sidewalls in silicon wafers.
- "Anisotropic diffusion": In image processing, a filtering technique that smooths an image while preserving its edges.
- The algorithm uses anisotropic diffusion to reduce noise without blurring important boundaries.
Variants and Related Words
- Anisotropy (n): The quality or state of being anisotropic; the measure of directional dependence.
- The anisotropy of the Earth's mantle influences seismic wave propagation.
- Isotropic (adj): Having identical properties in all directions. (Antonym)
- A perfect gas is considered an isotropic medium.
Synonyms
- Directionally dependent
- Non-isotropic
- Aeolotropic (a less common, technical synonym)
Antonyms
- Isotropic
- Directionally invariant
Adjective
- not invariant with respect to direction
- anisotropic crystals