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Noun: notation  now'tey-shun
  1. A technical system of symbols used to represent special things
    - notational system
  2. A comment or instruction (usually added)
    "he added a short notation to the address on the envelope";
    - note, annotation
  3. The activity of representing something by a special system of marks or characters

Derived forms: notations

Type of: comment, commentary, committal to writing, writing

Encyclopedia: Notation