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observational

[ob-zur-vey-shuh-nl] /ˌɒb zɜrˈveɪ ʃə nl/
adjective
1.
of, relating to, or founded on observation, especially founded on observation rather than experiment.
Origin
1825-1835
1825-35; observation + -al1
Related forms
observationally, adverb
nonobservational, adjective
preobservational, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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