vanadium group

va·na·di·um group

those elements resembling vanadium in chemical and metallurgic properties; included with vanadium are niobium and tantalum.

va·na·di·um group

(vă-nā'dē-ŭm grūp) Those elements resembling vanadium in chemical and metallurgic properties; included with vanadium are niobium and tantalum.