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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
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physical entity go
an entity that has physical existence
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matter go
that which has mass and occupies space
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substance go
the real physical matter of which a person or thing consists
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material, stuff go
the tangible substance that goes into the makeup of a physical object
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radioactive material go
material that is radioactive
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radioactive waste go
useless radioactive materials that are left after some laboratory or commercial process is completed
low-level radioactive waste
(medicine) radioactive waste consisting of objects that have been briefly exposed to radioactivity (as in certain medical tests)
noun.substance

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