pre·​syn·​ap·​tic | \ ˌprē-sə-ˈnap-tik How to pronounce presynaptic (audio) \

Definition of presynaptic

: of, occurring in, or being a neuron by which a nerve impulse is conveyed to a synapse a presynaptic membrane a presynaptic neuron

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Other Words from presynaptic

presynaptically \ ˌprē-​sə-​ˈnap-​ti-​k(ə-​)lē How to pronounce presynaptically (audio) \ adverb

Examples of presynaptic in a Sentence

Recent Examples on the Web It had been observed that vesicles containing neurotransmitters routinely hover in clusters near the presynaptic membrane until they are needed. Quanta Magazine, "‘Lava-Lamp’ Proteins May Help Cells Cheat Death," 26 Nov. 2018

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

First Known Use of presynaptic

1937, in the meaning defined above

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The first known use of presynaptic was in 1937

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Cite this Entry

“Presynaptic.” Dictionary, Merriam-Webster, Accessed 22 Oct. 2020.

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More Definitions for presynaptic


pre·​syn·​ap·​tic | \ -sə-ˈnap-tik How to pronounce presynaptic (audio) \

Medical Definition of presynaptic

: relating to, occurring in, or being part of a neuron by which a nerve impulse is conveyed to a synapse presynaptic terminals presynaptic inhibition a presynaptic membrane

Other Words from presynaptic

presynaptically \ -​ti-​k(ə-​)lē How to pronounce presynaptically (audio) \ adverb

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