fractionating column

/F R AE1 K SH AH0 N EY0 T IH0 NG K AA0 L AH0 M/
noun
  1. 1

    An apparatus for the separation of the volatile components of a liquid by means of fractional distillation, sometimes accompanied by selective adsorption

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Source: https://en.wiktionary.org/wiki/fractionating%20column