1) Many-sided 2) Multilateral 3) Tetramerous flowers 1) Multilateral 
having four parts
• (a.) Having the parts arranged in sets of four; as, a tetramerous flower. • (a.) Having four joints in each of the tarsi; -- said of certain insects.
Of a flower, having four segments in each perianth whorl, and usually in each whorl of stamens also. ... (09 Oct 1997) ... 
Te·tram'er·ous adjective [ Tetra- + Greek ... part.] 1. (Botany) Having the parts arranged in sets of four; as, a tetramerous flower. 2. (Zoology) Having four joints in each of the tarsi; -- said of certain insects. 
[adj] - (biology) having or consisting of four similar parts
adjective having or consisting of four similar parts; tetramerous flowers