What does isotropically mean?
Isotropically means equally in all directions, or in a way that does not vary with direction. The adverb is used when describing materials, forces, growth, deformation, or other processes whose properties are the same whichever direction is considered. For example, a substance that contracts isotropically shrinks equally along each axis, rather than becoming longer in one direction and shorter in another. The term is especially common in physics, engineering, geology, and materials science, where directional differences can be important. Its opposite, anisotropically, describes behavior that depends on direction. Isotropic behavior is an idealization; many real materials are only approximately isotropic because of their structure, composition, or manufacturing process. The word is also used more broadly in technical and scientific writing when equal treatment in all directions needs to be made explicit.
adverbIn an isotropic manner; equally in all directions or without directional variation.
- Equally in all directions or without directional variation.
"The material was designed to expand nearly isotropically as it cooled."
"The coating spread isotropically across the surface."
"Under uniform pressure, the sample deforms nearly isotropically."
A perfectly isotropic material has no preferred direction: expand it upward and it expands just as much sideways.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does isotropically come from?
The adverb isotropically is derived from the adjective isotropic, which comes from the Greek words iso, meaning equal, and tropos, meaning turn or direction. The underlying noun isotropy likewise refers to equality of properties in all directions. The related term isotropism was also used historically for the equal growth of plant organs in different directions. The forms were adopted into English in the 19th century in scientific contexts.
Related word forms
How isotropically is actually used
This is a technical term used especially in physics, materials science, geology, and related fields. It is more precise than simply saying that something happens equally in all directions.
Easily confused with isotropically
Isotropically describes behavior that is equal in all directions, whereas isotopically describes the presence of the same isotope or isotopes.
Isotropically indicates equal behavior in all directions, while anisotropically indicates that behavior varies according to direction.