Akademik

ground zero
noun
1. the target of a projectile (as a bomb or missile)
Hypernyms: ↑target, ↑target area
2. the site of the World Trade Center before it was destroyed
Instance Hypernyms: ↑site, ↑land site
Part Holonyms: ↑New York, ↑New York City, ↑Greater New York
3. the point of detonation (or above or below) of a nuclear weapon
Hypernyms: ↑point

Useful english dictionary. 2012.