interpolator

/ɪnˈtɜrpəˌleɪtər/
noun
  1. A person or thing that inserts something between other things, especially a person who adds words or passages into a text or conversation.
    • The editor acted as an interpolator, adding clarifications between the original paragraphs.
    • The ancient manuscript had been altered by an unknown interpolator who added new lines.
    • In the meeting, she was a constant interpolator, interrupting with her own comments.
  2. A device or algorithm that estimates values between known data points.
    • A good interpolator can predict missing temperatures based on nearby readings.
    • The software uses an interpolator to smooth the curve between measured points.
    • The image editor's interpolator fills in pixels when you enlarge a photo.
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