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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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causal agent, cause, causal agency go
any entity that produces an effect or is responsible for events or results
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agent go
a substance that exerts some force or effect
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nerve gas, nerve agent go
a toxic gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system
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organophosphate nerve agent go
any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936
soman, GD
a nerve agent easily absorbed into the body
noun.substance

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