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semipermeable

[ sem-ee-pur-mee-uh-buhl, sem-ahy- ]

adjective

  1. permeable only to certain small molecules:

    a semipermeable membrane.

semipermeable

/ ˌsɛmɪˈpɜːmɪəbəl /

adjective

  1. (esp of a cell membrane) selectively permeable
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Derived Forms

  • ˌsemiˌpermeaˈbility, noun
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Other Words From

  • semi·perme·a·bili·ty noun
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Word History and Origins

Origin of semipermeable1

First recorded in 1895–1900; semi- + permeable
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Example Sentences

Water has to be pushed through a semipermeable membrane that blocks the salt and other impurities from going through.

They are semi-colloidal, passing slowly through semipermeable membranes.

Similarly the diffusion of sols through "semipermeable" membranes is affected by lyotrope influence.

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semipermanentsemiplastic

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