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molecular sieve
noun
, Chemistry.
- 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
- 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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Example Sentences
Concentrators pull oxygen out of ambient air by forcing it under pressure through a “molecular sieve” filled with the mineral zeolite, which adsorbs nitrogen.
From New York Times
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