Procellariiformes

plural noun
Pro·​cel·​lar·​ii·​for·​mes | \ˌprōsəˌla(a)rēəˈfȯr(ˌ)mēz\

Definition of Procellariiformes 

: an order of predominantly pelagic birds comprising the petrels, shearwaters, albatrosses, and diving petrels

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History and Etymology for Procellariiformes

New Latin, from Procellaria + -iformes

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