411 REFERENCE · Wiktionary
A ring
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
The letter A designates the first (measured from ground zero); successive outer rings were designated B, C, etc.
Noun
en military The innermost circle of a nuclear explosion, within which all structures are destroyed.
Anagrams
en aginr Grain IgNAR Ngari Nigra Ragin Rigan agrin grain nigra raign raing