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collisionless
This term is a specialized technical descriptor used almost exclusively in plasma physics and astrophysics. It describes a state where the mean free path of particles is significantly larger than the characteristic scale of the system, meaning particles interact via collective electromagnetic fields rather than through direct physical impact.
Because it describes a specific physical condition of a medium, it carries a neutral, scientific connotation. It is not used in general conversation to describe a lack of accidents or crashes, as that would typically be described as accident-free or safe.
Meanings
Examples
The plasma in the solar wind is largely collisionless.
We need to apply a collisionless model to describe this specific gas behavior.
Is the shock wave in this region considered collisionless?
The particles move in a collisionless manner through the interstellar medium.
I wonder if the damping effect is purely collisionless in this scenario.
The Vlasov equation is the primary tool for analyzing collisionless plasmas.
This simulation assumes a collisionless environment to simplify the calculations.
This simulation assumes a collisionless environment to simplify the calculations.
The interaction is essentially collisionless due to the extremely low density.
The interaction is essentially collisionless due to the extremely low density.