experimental
US /ɪkˌsper.əˈmen.t̬əl/
UK /ɪkˌsper.əˈmen.t̬əl/
1.
relating to or based on experience or experiment
:
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The scientists conducted an experimental study.
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They are developing an experimental new drug.
2.
not yet fully established or developed, and therefore subject to change
:
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The new software is still in an experimental phase.
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His approach to art is very experimental.