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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
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indicator go
(chemistry) a substance that changes color to indicate the presence of some ion or substance
(chemistry) a substance that changes color to indicate the presence of some ion or substance
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litmus test, litmus
a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions
a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions
noun.substance
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