
1) Civil engineering term 2) Greek trickster deity
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https://www.crosswordclues.com/clue/dolos

A dolos (plural dolosse- approximate translation `knuckle bones`; approximate pronunciation `dohl-awe-sah) is a concrete block in a complex geometric shape weighing up to 20 tons, used in great numbers to protect harbour walls from the erosive force of ocean waves. They were developed in East London, a port city in South Africa, in 1963 and are......
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http://en.wikipedia.org/wiki/Dolos
[mythology] In Greek mythology, Dolos (sometimes pronounced `Dolus`) is the spirit of trickery and guile. He is also a master at cunning deception, craftiness, and treachery. He is apprentice of the Titan Prometheus, and Pseudologi. His female counterpart is Apate who is the goddess spirit of fraud and deception. He was parented by the Tita...
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http://en.wikipedia.org/wiki/Dolos_(mythology)

A dolos is an animal bone, usually a knuckle bone, used for divination.
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http://www.probertencyclopaedia.com/browse/AD.HTM
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