quinquevalent
quin que va lent |ˌkwiNGkwəˈvālənt ˌkwɪŋkwəˈveɪlənt | ▶adjective Chemistry another term for pentavalent.
quinquevalent |ˌkwɪnkwɪˈveɪl (ə )nt | ▶adjective Chemistry another term for pentavalent.