[ground zero] n (1946) 1: the point directly above, below, or at which a nuclear explosion occurs
2: the center or origin of rapid, intense, or violent activity or change
3: the very beginning: square one
[ground zero] n (1946) 1: the point directly above, below, or at which a nuclear explosion occurs
2: the center or origin of rapid, intense, or violent activity or change
3: the very beginning: square one
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012