What is the meaning of Concavo-concave?

(a.) Concave or hollow on both sides; double concave.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). concavo-concave. Retrieved September 25, 2026, from http://smartdefine.org/concavo-concave/definitions/1989831
ChicagoWebster's. 2011. "concavo-concave" http://smartdefine.org/concavo-concave/definitions/1989831 (accessed September 25, 2026).
HarvardWebster's 2011, concavo-concave, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/concavo-concave/definitions/1989831>.
MLAWebster's. "concavo-concave" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/concavo-concave/definitions/1989831>
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