concave
['acetabular ', 'cotyloid ', 'cotyloidal ', 'biconcave ', 'concavoconcave ', 'boatshaped ', 'bowlshaped ', 'bursiform ', 'pouchshaped ', 'pouchlike ', 'saclike ', 'concavoconvex ', 'cuplike ', 'cupular ', 'cupulate ', 'cupshaped ', 'depressed ', 'indented ', 'dished ', 'dishshaped ', 'planoconcave ', 'recessed ', 'saucershaped ', 'umbilicate ', 'urnshaped ', 'intrusive ', 'convex ']