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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
a particular kind or species of matter with uniform properties
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poison, toxicant, poisonous substance go
any substance that causes injury or illness or death of a living organism
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toxin go
a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
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neurotoxin, neurolysin go
any toxin that affects neural tissues
botulinum toxin
any of several neurotoxins that are produced by the anaerobic bacterium Clostridium botulinum
noun.substance

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