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Pronunciation: flu'id


  1. A nonsolid substance (liquid or gas) that tends to flow or conform to the shape of the container in which it is kept.
  2. Consisting of particles or distinct entities that can readily change their relative positions, tending to move or capable of flowing.

[L. fluidus, fr. fluo, to flow]

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