in-group

/IH0 N G R UW0 P/
noun
  1. 1

    The social group that one belongs to.

  2. 2

    In cladistics, the monophyletic group that includes all taxa of interest to the current study.

verb
  1. 1

    To form an ingroup.

Source: https://en.wiktionary.org/wiki/in-group, https://en.wiktionary.org/wiki/ingroup