English

heptabasic

From hepta- + basic.

A compound of hepta- + basic

Proto-Indo-European *septḿ̥ ‘seven’

Proto-Hellenic *heptə́ ‘seven’

Ancient Greek ἑπτά ‘seven’

Proto-Indo-European *gʷémtis ‘step’

…

Latin basis ‘pedestal, base’

Old French base

Middle English base ‘foundation’

English base

English basic

Today it means

adj containing seven replaceable hydrogen atoms

Language periods are conventional ranges, not dates for this word.

Etymograph / heptabasic