semipermeable

[ sem-ee-pur-mee-uh-buhl, sem-ahy- ]
/ ˌsɛm iˈpɜr mi ə bəl, ˌsɛm aɪ- /

adjective

permeable only to certain small molecules: a semipermeable membrane.

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Origin of semipermeable

First recorded in 1895–1900; semi- + permeable

OTHER WORDS FROM semipermeable

sem·i·per·me·a·bil·i·ty, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for semipermeable

British Dictionary definitions for semipermeable

semipermeable
/ (ˌsɛmɪˈpɜːmɪəbəl) /

adjective

(esp of a cell membrane) selectively permeable

Derived forms of semipermeable

semipermeability, noun
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

Medical definitions for semipermeable

semipermeable
[ sĕm′ē-pûrmē-ə-bəl, sĕm′ī- ]

adj.

Partially permeable.
Allowing passage of certain, especially small, molecules or ions but acting as a barrier to others. Used of biological and synthetic membranes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.