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observational

[ob-zur-vey-shuh-nl]
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adjective
  1. of, relating to, or founded on observation, especially founded on observation rather than experiment.
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Origin of observational

First recorded in 1825–35; observation + -al1
Related formsob·ser·va·tion·al·ly, adverbnon·ob·ser·va·tion·al, adjectivepre·ob·ser·va·tion·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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