A person who is the subject of an experiment; someone who participates in a study or test as the test subject rather than the researcher.
From experiment + -ee (suffix meaning 'one who receives or experiences'). The -ee suffix (opposite of -er) marks the recipient or subject of an action, similar to 'employee' (one employed) vs. 'employer' (one who employs). This modern coinage parallels 'interviewee' and 'trainee.'
The word 'experimentee' is a modern creation that acknowledges that research subjects are *people*—not just passive objects! This shift in language reflects a real ethical change in how science treats human research participants.
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