[noun ik-sper-uh-muhnt; verb ek-sper-uh-ment]


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 formsex·per·i·ment·er, ex·per·i·men·tor, ex·per·i·men·ta·tor, nounpre·ex·per·i·ment, nounpro·ex·per·i·ment, adjectivere·ex·per·i·ment, verb (used without object), nounun·ex·per·i·ment·ed, adjective

Synonyms for experiment

Synonym study

1. See trial.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for experimenter

Contemporary Examples of experimenter

Historical Examples of experimenter

  • On account of this alone no small interest will be aroused in the experimenter.

  • The experimenter had tasted elderberry once, but he knew no more of wine.

    Despair's Last Journey

    David Christie Murray

  • He was the on-looker, after all—not the experimenter he should have been and wished to be.

    The Shadow World

    Hamlin Garland

  • Table I shows the results of tests made by Feret, the French experimenter.

    Concrete Construction

    Halbert P. Gillette

  • But even in this he is impelled by the enthusiasm of an experimenter and a developer.

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 originala poetic experiment
an obsolete word for experience

verb (ɪkˈspɛrɪˌmɛnt)

(intr) to make an experiment or experiments
Derived Formsexperimenter, noun

Word Origin for experiment

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

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.

Online Etymology Dictionary, © 2010 Douglas Harper

experimenter in Medicine




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.
The process of conducting such a test; experimentation.
An innovative act or procedure.
The result of experimentation.


To conduct an experiment.
To try something new, especially in order to gain experience.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.