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From Biology-Online Dictionary | Biology-Online Dictionary
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(1) Of, or relating to the transmitting end of a discharge across a synapse.

(2) Pertaining to or being situated at the proximal side of a synapse.


The term is used in physiology to refer to the transmitting or proximal side of a synapse, such as a presynaptic cell (e.g. a neuron) which releases neurotransmitters that bind with the receptors of a postsynaptic cell (e.g. a muscle cell, a gland cell or a neuron).

Word origin: pre- (before) + synaptic » synapse

Compare: postsynaptic
See also: synapse

Related terms: