What is the meaning of cusps?

(DoD) Ridges of beach material extending seaward from the beach face with intervening troughs.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). cusps. Retrieved September 20, 2026, from http://smartdefine.org/cusps/definitions/1961200
ChicagoMilitary Dictionary (DoD). 2011. "cusps" http://smartdefine.org/cusps/definitions/1961200 (accessed September 20, 2026).
HarvardMilitary Dictionary (DoD) 2011, cusps, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/cusps/definitions/1961200>.
MLAMilitary Dictionary (DoD). "cusps" 4 April 2011. Web. 20 September 2026. <http://smartdefine.org/cusps/definitions/1961200>