Definition of microorganism

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  • microorganism is a valid Scrabble US word with a point value of 20
  • microorganism is a valid Scrabble UK word with a point value of 20
  • microorganism is a valid Words with friends word with a point value of 25

Definition of microorganism

  • any organism of microscopic size (noun)

    Synonyms

    1. micro-organism

See definition of microorganism in Merriam Webster