A fossil echinus associated with the genus Cannulus so called from the expected similarity to a cap
- a rock that types the top wall or building
- one last touch; a crowning accomplishment; a culmination
- A fossil echinus of this genus Cannulus; -- so named from its expected resemblance to a cap.
additionally cap-stone, topmost rock in a construction, 1680s, from limit + stone (n.). Earliest use is figurative.
Wooded heights form a semicircle round the town, which is protected from sea winds by Capstone Hill.