. "concavo-convex"@en-us . . . "concave on one side and convex on the other with the concavity being greater than the convexity"@en-us . . "300536416"@en-us . "300536416"^^ . "300501323"@en-us . "00536416-a"^^ . "concavo-convex"^^ . "0"^^ . "300507314"@en-us . "0"^^ . .