unreproducible

/ˌʌnriːprəˈduːsəbəl/
adjective
  1. Impossible to copy, repeat, or recreate exactly.
    • The scientist admitted the experiment's results were unreproducible in other labs.
    • That vintage photograph is unreproducible because the original negative was lost.
    • The chef's signature dish is unreproducible without his secret ingredient.
What does "unreproducible" mean? | whatsthatwordmean | whatsthatwordmean