quadridentate
/ˌkwɒdrɪˈdɛnteɪt/adjective
1 Botany and Zoology. Having four serrations, teeth, or toothlike projections.
2 Chemistry. Of a ligand: forming four separate bonds. Of a complex: formed by such a ligand.
Origin
Mid 18th century; earliest use found in James Lee (1715–1795), nurseryman. From post-classical Latin quadridentatus from classical Latin quadri- + dentātus.