microinjection

/ˈmaɪkroʊɪnˌdʒɛkʃən/
noun
  1. The process or act of injecting a very small amount of a substance into a cell, egg, or tiny organism using a special needle under a microscope.
    • The scientist perfected the microinjection technique over several years.
    • A successful microinjection can change how a cell behaves.
    • Microinjection is used to introduce new DNA into animal eggs.