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Pronunciation: me'de-yum, -a


  1. A means; that through or by which an action is performed.
  2. A substance through which impulses or impressions are transmitted.
  3. The liquid holding a substance in solution or suspension.
  4. Any of the substances in which a chromatographic or electrophoretic separation is effected.

Synonym(s): culture medium

[L. neuter of medius, middle]

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