semipermeable Meaning in the Cambridge English Dictionary
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Meaning of “semipermeable” in the English Dictionary

"semipermeable" in British English

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semipermeableadjective

uk   /ˌsem.iˈpɜː.mi.ə.bl̩/  us   /ˈpɜːr-/ specialized
Something, for ​example a ​cell membrane, that is semipermeable ​allows some ​liquids and ​gases to ​pass through it, but not ​others.
(Definition of semipermeable from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"semipermeable" in American English

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semipermeableadjective [not gradable]

 /ˌsem·iˈpɜr·mi·ə·bəl, ˌsem·ɑɪ-/
biology, chemistry allowing some ​liquids and ​gases, but not ​others, to ​pass through
(Definition of semipermeable from the Cambridge Academic Content Dictionary © Cambridge University Press)
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