heptavalent

[hep-tuh-vey-luhnt]

adjective

Chemistry.

1. septivalent.

heptavalent

/ hɛpˈtævələnt, ˌhɛptəˈveɪlənt /

adjective

1. Also: septivalent. chem having a valency of seven

Word History and Origins

Origin of heptavalent¹

hepta- + -valent