Crest (noun)

1. A tuft or ridge of feathers, hair, or other material on the head of a bird or other animal.
2. A decorated or ornamental headpiece worn on ceremonial occasions.
3. The highest point or top of something.

Origin:

Middle english: from old french crest, from latin crista "tuft, plume".

Examples:

1. The eagle has a distinctive white crest on its head.
2. The knight wore a crest on his helmet.
3. The crest of the hill offered a beautiful view.
4. The crest of the wave was about to break.
5. The crest of the volcano was covered in snow.