synaptic vesicle
(redirected from Presynaptic vesicle)Also found in: Dictionary, Medical.
Related to Presynaptic vesicle: synaptic cleft, synaptic gap
synaptic vesicle
[si¦nap·tik ′ves·ə·kəl] (neuroscience)
A small membrane-bound structure in the axon terminals of nerve cells that contains neurotransmitters and releases them by exocytosis when an action potential reaches the terminal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.