plural noun
Pseu·dom·o·na·da·ce·ae | \süˌdämənəˈdāsēˌē, ˌsüdəˌmänəˈd-\

Definition of Pseudomonadaceae 

: a large family of rod-shaped or somewhat spiral usually aerobic and gram-negative bacteria (order Pseudomonadales) that do not form endospores, are commonly motile by polar flagella, and include saprophytes in soil and water and important plant and animal pathogens — see pseudomonas, xanthomonas

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History and Etymology for Pseudomonadaceae

New Latin, from Pseudomonad-, Pseudomonas, type genus + -aceae

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