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nuclear winter
nuclearize
nuclease
nucleate
nucleation
nuclei
nucleic acid
nuclein
nucleo-
nucleocapsid
nucleoid
nucleolar
nucleolar organizer
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nuée ardente
nu·ée ar·dente [ n ay aar dnt ] (plural nu·ée ar·dentes)


noun 
Definition:
 
cloud of volcanic debris: a thick, rapidly moving, deadly, gaseous cloud produced by a volcano and consisting of steam, ash, and rock segments
[< French, "burning cloud"]
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