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molecular sieve

noun

, Chemistry.
  1. a compound with molecule-size pores, as some sodium aluminum silicates, that chemically locks molecules in them: used in purification and separation processes.

molecular sieve

noun

  1. chem a material that can absorb large amounts of certain compounds while not absorbing others and is thus suitable for use in separating mixtures

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Word History and Origins

Origin of molecular sieve1

First recorded in 1925–30

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molecular medicinemolecular spectrum

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