Of, relating to, or having the nature of a hexagon; hexagonal (archaic form).
An obsolete or rare variant combining 'hexagon' with the suffix '-ical' (relating to). This redundant form competed with simpler 'hexagonal' during early geometric terminology standardization and fell out of use.
Like 'hexagonial,' this is a linguistic fossil—an extra-fancy way of saying 'hexagonal' that seemed impressive in the 1600s but got eliminated by the principle of linguistic efficiency (why say more when less works?).
Complete word intelligence in one call. Free tier — 50 lookups/day.