plug-ins

/P L AH1 G IH0 N Z/
noun
  1. 1

    Anything that plugs into something.

  2. 2

    A module or device that interacts with another to add a specific feature or function.

  3. 3

    An electric vehicle that can be recharged from an external power source.

    syn:PEV

Source: https://en.wiktionary.org/wiki/plug-in, https://en.wiktionary.org/wiki/plug-ins