plural noun
Hy·pho·mi·cro·bi·a·ce·ae | \¦hī(ˌ)fō(ˌ)mīˌkrōbēˈāsēˌē\

Definition of Hyphomicrobiaceae 

: a small family of heterotrophic soil or water bacteria (order Hyphomicrobiales) that often have the individual cells linked by fine filaments

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History and Etymology for Hyphomicrobiaceae

New Latin, from Hyphomicrobium, type genus (from hypho- + microbium) + -aceae

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