[trans-mem-breyn, tranz-]
adjective Biology.
occurring across a membrane, as an electric potential or the transport of ions or gases.

1940–45; trans- + membrane Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

transmembrane trans·mem·brane (trāns-měm'brān, trānz-)
Passing or occurring across a membrane.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
There are three types of cell surface receptors: membrane enzymes, ion channels, and transmembrane receptors.
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