A noticeable gap or space between two teeth, most commonly between the upper front teeth.
From Greek 'dia-' (through/apart) + 'stema' (standing position, from 'histanai' meaning to stand). The term entered English through medical and dental terminology in the 17th century.
In many cultures throughout history, a diastema was a sign of wealth and beauty—only rich people could afford to leave their teeth alone, while laborers' teeth wore down from grinding grain by hand!
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