biconvex convexo-convex lenticular lentiform
biconvex%5:00:00:convex:00 convexo-convex%5:00:00:convex:00 lenticular%5:00:00:convex:00 lentiform%5:00:00:convex:00
bikonveksen lečast
convex on both sides; shaped like a lentil