English Words Starting With E

• electrometer

  nounC
  /ɪˌlɛkˈtrɒmɪtə/An instrument for measuring electric potential difference or electric charge.
• electromotive force

  nounLow
  /ɪˌlɛktrə(ʊ)ˈməʊtɪv ˈfɔːs/The electrical potential difference generated by a source, such as a battery or generator, that drives an electric current around a circuit.
• electromotive series

  nounLow
  /ɪˌlɛktrə(ʊ)ˈməʊtɪv ˈsɪəriːz/A list of metals (and sometimes other substances) arranged in order of their tendency to lose electrons (oxidise) or gain electrons (reduce).
• electromyogram

  nounC2
  /ɪˌlɛk.trəʊˈmaɪ.ə.ɡræm/A record or graph of the electrical activity of a muscle.
• electromyograph

  nounC2
  /ɪˌlɛktrə(ʊ)ˈmaɪəɡrɑːf/A medical instrument that detects and records the electrical activity produced by skeletal muscles.
• electromyography

  nounLow (Technical)
  /ɪˌlɛk.trəʊ.maɪˈɒɡ.rə.fi/A diagnostic technique for recording the electrical activity produced by skeletal muscles.
• electron

  nounC1
  /ɪˈlɛktrɒn/A stable subatomic particle with a negative electric charge, found in all atoms and acting as the primary carrier of electricity in solids.
• electron affinity

  nounC2
  /ɪˈlɛktrɒn əˈfɪnɪti/A measure of the energy change when an atom in its gaseous state gains an electron to form a negative ion.
• electron camera

  nounC2 (Very Low Frequency)
  /ɪˈlɛktrɒn ˈkam(ə)rə/A scientific instrument that uses an electron beam instead of light to form a detailed image of an object.
• electron capture

  nounVery Low
  /ɪˈlɛktrɒn ˈkæptʃə/A process in nuclear physics where an atomic nucleus absorbs an inner-shell electron, converting a proton into a neutron.
• electron diffraction

  nounVery Low
  /ɪˈlɛktrɒn dɪˈfrækʃ(ə)n/A phenomenon where a beam of electrons scatters or bends as it passes by an object or through a crystalline material, creating an interference pattern that reveals the material's atomic structure.
• electron gun

  nounC2
  /ɪˌlɛk.trɒn ˈɡʌn/A device that produces a narrow, focused beam of electrons, typically by heating a cathode.
• electron hole

  nounC2/Very Low
  /ɪˈlɛktrɒn həʊl/A conceptual void in a semiconductor's valence band created when an electron moves into the conduction band, behaving like a positive charge carrier.
• electron lens

  nounC2
  /ɪˈlɛktrɒn lɛnz/A device that uses electric and/or magnetic fields to focus a beam of electrons, analogous to how an optical lens focuses light.
• electron micrograph

  nounC2
  /ɪˈlɛktrɒn ˈmaɪkrə(ʊ)ɡrɑːf/A photograph of an object as seen through an electron microscope.
• electron microscope

  nounLow frequency
  /ɪˌlɛk.trɒn ˈmaɪ.krə.skəʊp/A scientific instrument that uses a beam of accelerated electrons, instead of light, to illuminate and produce a highly magnified image of a specimen.
• electron multiplier

  nounLow
  /ɪˌlɛk.trɒn ˈmʌl.tɪ.plaɪ.ər/A device, typically a vacuum tube or semiconductor, that generates multiple secondary electrons from a single primary electron or photon, thereby amplifying a weak electrical signal.
• electron neutrino

  nounLow (Specialist)
  /ɪˌlɛktrɒn njuːˈtriːnəʊ/A fundamental subatomic particle of the lepton family, associated with the electron, possessing no electric charge and an extremely small mass.
• electron optics

  nounC2
  /ɪˌlɛk.trɒn ˈɒp.tɪks/The branch of physics that deals with the control of electron beams using electric and magnetic fields, analogous to the way light rays are controlled by lenses.
• electron pair

  nounLow
  /ɪˈlɛk.trɒn pɛː/Two electrons occupying the same orbital and having opposite spins.

Showing 1281–1300 of 4896 words.