Relating to cosmetology, the study and practice of beauty treatments and cosmetics.
From cosmetology (cosmetic plus Greek -logia 'study of') plus -ical (adjective suffix). Emerged in the early 1900s as cosmetology became an academic field.
While 'cosmetician' is a person, 'cosmetological' is the adjective you'd use to describe the science and study itself—like 'cosmetological education' or 'cosmetological research.'
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