ground zero, n.
the point of detonation (or above or below) of a nuclear weapon
<noun.location>
ground zero
semantic pointers
hypernym
the site of the World Trade Center before it was destroyed
<noun.location>
ground zero
semantic pointers
instance hypernym
part holonym
the target of a projectile (as a bomb or missile)
<noun.location>
ground zero
semantic pointers
hypernym