Equipment, clothing, or protective gear worn on the head, such as helmets, hats, or orthodontic headgear.
From 'head' plus 'gear' (equipment or clothing). This compound noun became common in the 20th century as specialized protective equipment evolved.
Orthodontists use headgear that looks medieval, but it's based on centuries of understanding how constant gentle pressure reshapes bone—the same principle used to grow coral in laboratories!
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