concavation

== English == === Etymology === From concave +‎ -ation. === Noun === concavation (usually uncountable, plural concavations) The act of making concave. the state of being concave Synonym: concavity === References === “concavation”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.