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1911 Encyclopedia Britannica
(Lat. for the "ankle-bone"), in architecture, the slope of an embankment wall, which is thicker at the bottom than at the top, to resist the pressure of the earth behind it.
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Chisholm, Hugh, General Editor. Entry for 'Talus'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/t/talus.html. 1910.