Cell Component
presynaptic terminals
[ pree-si-nap-tik tur-muh-nls ]
Subclass of:
Synapses; Axon
Definitions related to presynaptic terminals:
  • (axon terminal) The end of an axon.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
  • (terminal bouton) Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal bouton is a specialized region of it.
    Gene Ontology Dictionary
    Gene Ontology Consortium, 2021
  • (presynaptic knob) An area at the end of an axon that contains neurotransmitters in synaptic vesicles.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • The distal terminations of axons which are specialized for the release of neurotransmitters. Also included are varicosities along the course of axons which have similar specializations and also release transmitters. Presynaptic terminals in both the central and peripheral nervous systems are included.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.