Relating to or characteristic of education; of or pertaining to the educational process.
From education + -ary (relating to), a variant of -arian. The suffix -ary comes from Latin -arius (relating to or connected with).
This is an archaic variant of 'educational'—rarely used now, it survived in some specialized contexts, showing how newer word formations sometimes crowd out older ones even when both are grammatically sound.
Complete word intelligence in one call. Free tier — 50 lookups/day.