semipermeable

adjective semi·per·me·able \ ˌse-mē-ˈpər-mē-ə-bəl , ˌse-ˌmī- , -mi- \
Updated on: 27 Mar 2018

Definition of semipermeable

: partially but not freely or wholly permeable; specifically : permeable to some usually small molecules but not to other usually larger particles
  • a semipermeable membrane

semipermeability

play \ˌse-mē-ˌpər-mē-ə-ˈbi-lə-tē, ˌse-ˌmī-, -mi-\ noun

Recent Examples of semipermeable from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'semipermeable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of semipermeable

1888

in the meaning defined above

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Medical Dictionary

semipermeable

adjective semi·per·me·able \ ˌsem-i-ˈpər-mē-ə-bəl, ˌsem-ˌī- \

medical Definition of semipermeable

: partially but not freely or wholly permeable; specifically : permeable to some usually small molecules but not to other usually larger particles
  • a semipermeable membrane

semipermeability

play \-ˌpər-mē-ə-ˈbil-ət-ē\ noun, plural -ties

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