Small rounded buttons or knob-like projections, or in anatomy, the synaptic terminals at the end of nerve fibers.
From French bouton meaning 'button' or 'bud,' derived from Old French boter (to push). In neuroscience, adopted to describe the rounded endings of axons that connect with other neurons.
Your brain's communication system relies on these tiny structures—boutons release neurotransmitters like a biological texting service! Each one is invisibly small, yet billions of them firing create your every thought.
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