exaptations

/IH0 G Z AA1 P T EY1 SH AH0 N Z/
noun
  1. 1

    (biology, evolutionary theory) The use of a biological structure or function for a purpose other than that for which it initially evolved.

  2. 2

    (linguistics, by extension) The promotion of meaningless or redundant material so that it does new grammatical (morphosyntactic or phonological) or semantic work.