Semipermeable

//ˌsɛmiˈpɜː(ɹ)miəbəl// adj

Definitions

Adjective
  1. 1
    Permeable to some things and not to others, as a cell membrane which allows some molecules through but blocks other substances.
Adjective
  1. 1
    (of a membrane) selectively permeable wordnet

Etymology

From semi- + permeable.

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