| 释义 | bou·ton \(ˈ)bü|tōⁿ\ noun
 or bouton ter·mi·nal \-ˌterməˈnal\
 (plural boutons \-ōⁿ\ ; or boutons termi·naux \-ˈnō\)
 Etymology: French bouton terminal, literally, terminal button
 : a terminal club-shaped enlargement of a nerve fiber lying in contact with the body or dendrites of another neuron — called also end bulb, end foot
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