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trial

noun [C/U] (TEST)
 
 /ˈtrɑɪˌəl, trɑɪl/

Definition

a test, usually over a limited period of time, to discover how effective or suitable something or someone is: [C] The agency plans to conduct clinical trials of the drug. [U] We have the videotapes on a trial basis for one week – if we don’t like them, we can send them back.
(Definition of trial noun (TEST) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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