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Related to semipermeable: semipermeable membrane


 (sĕm′ē-pûr′mē-ə-bəl, sĕm′ī-)
1. Partially permeable.
2. Allowing passage of certain, especially small, molecules or ions but acting as a barrier to others. Used of biological and synthetic membranes.

sem′i·per′me·a·bil′i·ty n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) (esp of a cell membrane) selectively permeable
ˌsemiˌpermeaˈbility n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌsɛm iˈpɜr mi ə bəl, ˌsɛm aɪ-)

permeable only to certain small molecules: a semipermeable membrane.
sem`i•per`me•a•bil′i•ty, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.semipermeable - (of a membrane) selectively permeable
permeable - allowing fluids or gases to pass or diffuse through; "permeable membranes"; "rock that is permeable by water"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
* The conflict between scientific and religious interpretations arise because the boundary between causality and meaning is semipermeable (Rolston).
Primary sludge was held in vials capped with semipermeable membranes that allowed liquid and gas to flow through the vials.
Some tubes have an open lumen, and some have a semipermeable membrane.
Tests discerned that the blob had a semipermeable membrane across which diffused chemicals that reacted inside the cell.
In a prospective study of 148 smallpox vaccine recipients whose vaccination sites were covered with a waterproof gauze-impregnated transparent bandage and an outer waterproof semipermeable bandage, bandages were changed and the vaccination site was evaluated every 3-5 days until the vaccination site was healed (mean of 9.6 bandage changes, mean follow-up of 27.9 days).
In the health care setting, gauze dressing and a layer of semipermeable dressing over the vaccination site is recommended until the scab falls off, to prevent transmission to susceptible patients.
Narcotics and explosives easily pass through a semipermeable membrane, but inorganic materials and water vapor cannot.
Most implants are single-lumen silicone prostheses that have a semipermeable outer envelope made of a silicone elastomer and filled with silicone gel.
("Few phenomena are so well understood thermodynamically, or so ill understood kinetically, as the osmotic flow of a solvent through a semipermeable membrane.")
"Workspheres" also publicized some design ideas that would really work, including Snowcrash's hanging file racks that create semipermeable screens between workstations, and the stepped, three-tiered display shelves that cocoon around the back of a desktop surface like a theatrical backdrop in Brian Alexander's Drift System Desk, designed to keep a number of paper files or projects visible simultaneously (Drift's backless tricycle seating is better left to the daycare set).