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synaptic cleft

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noun Physiology.
  1. the small gap, measured in nanometers, between an axon terminal and any of the cell membranes in the immediate vicinity.

Origin of synaptic cleft

First recorded in 1975–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
synaptic cleft in Medicine

synaptic cleft

n.
  1. synaptic gap