has cross section has_cross_section 2-D shape convex 3-D shape PATO:0002007 Use this term or an is_a child of this term when the entire shape of the object is known. quality Image:http://upload.wikimedia.org/wikipedia/commons/0/06/Convex_polygon_illustration1.png A complete three dimensional shape in which for every line connecting pair of points on the object is within the object. Or: a shape lacking cavities. Contrast: concave. concave 3-D shape 3-D shape