experimenter

Everyday

1. A person who does experiments, especially in science. tree →
2. A person who likes trying new things to see what happens. tree →

In the lessons

Science lessons: the experimenter plans a fair test, changes one variable, measures and records results; a good experimenter keeps everything else the same. In stories, a curious character can be a bold experimenter — Alice experiments by eating and drinking to change size.

Examples

• The experimenter measured the water every hour. tree →
• A good experimenter changes only one thing at a time. tree →
• Alice became an experimenter with the little cakes. tree →
• The experimenter wrote the results in a table. tree →
• Benjamin Franklin was a famous experimenter with electricity. tree →
• Be a careful experimenter and wear safety goggles. tree →

Note

«an experimenter» (vowel sound). From experiment + -er. Also spelled «experimentor» rarely, but -er is standard. Related: experiment (noun and verb), experimental.