Definition of postfix in English:



  • 1Biology
    [with object] Treat (a biological substance or specimen) with a second fixative.

    • ‘A portion of this specimen was postfixed in B - 5 fixative.’
    • ‘The cells in these images were postfixed with osmium tetroxide.’
    • ‘The tissue was subsequently postfixed in osmium tetroxide and embedded in epoxy resin.’
    • ‘Cells were postfixed in 1% osmium tetroxide in 0.1 M cacodylate buffer for 50 min.’
    • ‘In some cases the cells were postfixed for 90 min in a solution of 1% osmium tetroxide in PBS.’
  • 2Linguistics
    rare Append as a suffix.


  • A suffix.