A ground zero is the location under an explosion in the air.
Like the places in Hiroshima and in Nagasaki.
The term is often used to refer to the New York City site of the September 11 attacks in 2001. Both 1 World Trade Center and 2 World Trade Center were attacked separately, but ended up as one joint pile of debris. So there is only one ground zero in Manhattan. The nuclear explosions in Hiroshima and Nagasaki resulted in two of these locations. But what is the term for multiple air burst sites?
I think it is one of the following four:
- This could represent both (ground zero)s or ground (zeros). I can describe the two distinct identity elements of two mathematical groups as two zeros, and a ground related to the zeros would be called ground zeros.
- This describes a single ground which is zeroing.
- This describes the zero location of multiple grounds, which share the same zero, so that would fit the case of multiple airburst sites, but it depends on that both places are are compared in one coordinate space and therefore share the same zero.
- This would be strange as it involves the plural twice, so it should describe at least four elements, at least two grounds multiplied by at least two zeros, and we have two places, not four.
Of course it could be none of them.
So what is it, and why?