auxetic

[awg-zet-ik, awk-set-]Biology
noun
  1. an auxetic agent.

Origin of auxetic

1730–40; < Greek auxētikos increasing, equivalent to auxēt(ós) increased (derivative of aúxein; see auxesis) + -ikos -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018