ei·do·lon (/īˈdōlən/)

1. an image without real existence; phantom; apparition. 2. an ideal person or thing.

In ancient Greek literature, an eidolon is an image, idol, double, apparition, phantom, ghost; a spirit-image of a living or dead person; a shade or phantom look-alike of the human form.

Man O’War Beach, West Lulworth, Wareham, UK.