experimental

[ik-sper-uh-men-tl]
adjective
1.
pertaining to, derived from, or founded on experiment: an experimental science.
2.
of the nature of an experiment; tentative: The new program is still in an experimental stage.
3.
functioning as an experiment or used for experimentation: an experimental airplane.
4.
based on or derived from experience; empirical: experimental knowledge.
noun
5.
something that is experimental.

Origin:
1400–50; late Middle English < Medieval Latin experīmentālis. See experiment, -al1

experimentally, adverb
nonexperimental, adjective
nonexperimentally, adverb
postexperimental, adjective
preexperimental, adjective
pseudoexperimental, adjective
pseudoexperimentally, adverb
quasi-experimental, adjective
quasi-experimentally, adverb
semiexperimental, adjective
semiexperimentally, adverb
unexperimental, adjective
unexperimentally, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
experimental (ɪkˌspɛrɪˈmɛntəl)
 
adj
1.  relating to, based on, or having the nature of experiment: an experimental study
2.  based on or derived from experience; empirical: experimental evidence
3.  tending to experiment: an experimental artist
4.  tentative or provisional: an experimental rule in football
 
experi'mentally
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

experimental
mid 15c., from experiment + -al (1). Experimental farm is recorded from 1792.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
It's still in the development stage, but several experimental vaccines tested
  on laboratory monkeys have proved successful.
Its verse is by no means of equal value, and some of it was experimental work
  by persons of no special poetic talent.
Much of its work was sound and still endures, if much was experimental and had
  to be undone.
Democracy was still experimental, doubtful, full of gun-powder.
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