x_{1} is a concave curve/turn/bend in x_{2}, at locus x_{3}, and defined by set of points/properties x_{4}.

Also: x_{1} is concave. Convex: ze'okru. See also: zo'i, kruvi.

- ze'okru
- x
_{1}is a convex curve/turn/bend in x_{2}, at locus x_{3}, and defined by set of points/properties x_{4}.