septivalent

or sep·ta·va·lent

[ sep-tuh-vey-luh nt ]
/ ˌsɛp təˈveɪ lənt /

adjective Chemistry.

having a valence of seven; heptavalent.

Origin of septivalent

First recorded in 1870–75; septi- + -valent

British Dictionary definitions for septivalent

septivalent

septavalent (ˌsɛptəˈveɪlənt)

/ (ˌsɛptɪˈveɪlənt) /

adjective

chem another word for heptavalent