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Pronunciation: va'por


  1. Molecules in the gaseous phase of a solid or liquid substance exposed to a gas.
  2. A visible emanation of fine particles of a liquid.
  3. A medicinal preparation to be administered by inhalation.

[L. steam]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.