ion channel

noun

: a cell membrane channel that is selectively permeable to certain ions (as of calcium or sodium)

Example Sentences

Recent Examples on the Web Whether an ion channel is open or closed is context dependent. Gabriel A. Silva, Forbes, 2 Aug. 2022 The possibility of preventing AP2A2 from binding to the ion channel intrigued the SUNY Buffalo team. Rebecca Coffey, Forbes, 27 Oct. 2021 Insects use many other classes of ion channel olfactory receptors, including ones that are much more complex and much more specific than those of the jumping bristletail. Jordana Cepelewicz, Wired, 27 June 2021 Insects use many other classes of ion channel olfactory receptors, including ones that are much more complex and much more specific than those of the jumping bristletail. Jordana Cepelewicz, Wired, 27 June 2021 Insects use many other classes of ion channel olfactory receptors, including ones that are much more complex and much more specific than those of the jumping bristletail. Jordana Cepelewicz, Wired, 27 June 2021 Insects use many other classes of ion channel olfactory receptors, including ones that are much more complex and much more specific than those of the jumping bristletail. Jordana Cepelewicz, Wired, 27 June 2021 Insects use many other classes of ion channel olfactory receptors, including ones that are much more complex and much more specific than those of the jumping bristletail. Jordana Cepelewicz, Wired, 27 June 2021 Insects use many other classes of ion channel olfactory receptors, including ones that are much more complex and much more specific than those of the jumping bristletail. Jordana Cepelewicz, Wired, 27 June 2021 See More

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

Word History

First Known Use

1964, in the meaning defined above

Time Traveler
The first known use of ion channel was in 1964

Dictionary Entries Near ion channel

Cite this Entry

“Ion channel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion%20channel. Accessed 2 Dec. 2022.

Medical Definition

ion channel

noun

: a cell membrane channel that is selectively permeable to certain ions (such as of calcium or sodium)
Researchers now know that not only do all cells, including nerve cells, have ion channels through which substances such as sodium and calcium move in and out, but that particular subtypes of sodium channels govern the transmission of pain. Judy Foreman, The Los Angeles Times
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