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[noun ik-sper-uh-muh nt; verb ek-sper-uh-ment] /noun ɪkˈspɛr ə mənt; verb ɛkˈspɛr əˌmɛnt/
a test, trial, or tentative procedure; an act or operation for the purpose of discovering something unknown or of testing a principle, supposition, etc.:
a chemical experiment; a teaching experiment; an experiment in living.
the conducting of such operations; experimentation:
a product that is the result of long experiment.
Obsolete. experience.
verb (used without object)
to try or test, especially in order to discover or prove something:
to experiment with a new procedure.
Origin of experiment
1325-75; Middle English: proof < Latin experīmentum. See experience, -ment
Related forms
experimenter, experimentor, experimentator, noun
preexperiment, noun
proexperiment, adjective
reexperiment, verb (used without object), noun
unexperimented, adjective
2. research, investigation.
Synonym Study
1. See trial. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for experimenter
Contemporary Examples
Historical Examples
  • At present, however, the scarcity and cost and danger of radium will keep it in the hands of the experimenter.

    Boys' Second Book of Inventions Ray Stannard Baker
  • Table I shows the results of tests made by Feret, the French experimenter.

    Concrete Construction Halbert P. Gillette
  • He was not killed, as were many less rash than he; but broke his legs, and nothing more is read of him as an experimenter.

    The Aeroplane Claude Grahame-White and Harry Harper
  • But even in this he is impelled by the enthusiasm of an experimenter and a developer.

  • Taste will teach the experimenter more than I can even suggest.

    The New Glutton or Epicure Horace Fletcher
  • The experimenter had tasted elderberry once, but he knew no more of wine.

    Despair's Last Journey David Christie Murray
  • Every farmer should be more or less of an investigator and experimenter.

    The First Book of Farming Charles L. Goodrich
  • He was also an early, but unsuccessful, experimenter in the photographic art.

  • But in his beginnings he was always a student, an experimenter.

    mile Verhaeren Stefan Zweig
British Dictionary definitions for experimenter


noun (ɪkˈspɛrɪmənt)
a test or investigation, esp one planned to provide evidence for or against a hypothesis: a scientific experiment
the act of conducting such an investigation or test; experimentation; research
an attempt at something new or different; an effort to be original: a poetic experiment
an obsolete word for experience
verb (ɪkˈspɛrɪˌmɛnt)
(intransitive) to make an experiment or experiments
Derived Forms
experimenter, noun
Word Origin
C14: from Latin experīmentum proof, trial, from experīrī to test; see experience
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for experimenter



mid-14c., from Old French esperment "practical knowledge, cunning, enchantment; trial, proof, example, lesson," from Latin experimentum "a trial, test, proof, experiment," noun of action from experiri "to test, try" (see experience).


late 15c., from experiment (n.). Related: Experimented; experimenting.



late 15c., from experiment (n.). Related: Experimented; experimenting.

Online Etymology Dictionary, © 2010 Douglas Harper
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experimenter in Medicine

experiment ex·per·i·ment (ĭk-spěr'ə-mənt)

  1. A test under controlled conditions that is made to demonstrate a known truth, to examine the validity of a hypothesis, or to determine the efficacy of something previously untried.

  2. The process of conducting such a test; experimentation.

  3. An innovative act or procedure.

  4. The result of experimentation.

v. ex·per·i·ment·ed, ex·per·i·ment·ing, ex·per·i·ments (-měnt')
  1. To conduct an experiment.

  2. To try something new, especially in order to gain experience.

ex·per'i·ment'er n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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experimenter in Science
A test or procedure carried out under controlled conditions to determine the validity of a hypothesis or make a discovery. See Note at hypothesis.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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