Definition: The word "acentrous" has a vague etymology but it means something close to "spherical". The term can mean a spherical object like a sphere or a cup, or more broadly referring to an object that has its surface covered by many different layers. In physics and chemistry, an "acentrous substance" is defined as one that is composed of particles with very different masses or energies. For example, a solid might be considered a "centrally at rest" substance; it has no mass and all the particles in it have equal energy. Similarly, a gas is often said to be a "center-of-mass" substance since it does not depend on the motion of its atoms or molecules. However, the term "acentrous" may also be used loosely as an adjective for a substance that is quite spherical, and can refer to a variety of things like a sphere or cup. For example, one might say that "this cup-shaped object is centradous." In other contexts, it could mean a homogeneous material with uniform density. The etymology of the word "acentrous" is not entirely clear; it may be related to the Greek words "antikos" and "centros" which are both related to the concept of a sphere. However, without more context, it's difficult to say for sure how closely the term relates to the word "sphere".

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