Definition of "experimenter" []

• A person who experiments. (noun)

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• "Haitinger carried over his skills as an experimenter from the Chemistry Institute to Welsbach's industry along with a dexterity with financial issues back to the domain of science."
• "To the south of us the United States, led by a great experimenter is working out its own salvation."
• "If the word be 'England' the white and black marks on the paper will, if the experimenter is a 'visualiser,' produce at once a picture of some kind accompanied by a vague and half conscious emotional reaction of affection, perhaps, or anxiety, or the remembrance of puzzled thought."