microelectrode

/ˌmaɪkroʊɪˈlɛktroʊd/
noun
  1. A very small electrode used to measure electrical activity in tiny areas, such as in a single cell or nerve.
    • Microelectrodes are essential tools for studying how brain cells communicate.
    • Inserting a microelectrode into the cell requires a steady hand and precise equipment.
    • The scientist used a microelectrode to record signals from a single neuron.