Having eight sides with only half of them visible or emphasized; partially octagonal in shape.
From 'demi-' (half) + 'octagonal' (eight-sided, from Latin 'octo' meaning eight + Greek '-gonal' meaning angled). This architectural term combines geometric and prefix elements common in English technical vocabulary.
Medieval fortresses used demioctagonal towers because they're stronger than square ones but easier to build than fully octagonal towers—it's engineering pragmatism disguised as aesthetics.
Complete word intelligence in one call. Free tier — 50 lookups/day.