Medical Definition of vibrio
1 capitalized : a genus of short rigid motile bacteria of the family Vibrionaceae that are straight or curved rods, have one or sometimes two or three polar flagella enclosed in a sheath, and include various saprophytes and a few pathogens (as V. cholerae, the cause of cholera in humans)
2: any bacterium of the genus Vibrio; broadly : a curved rod-shaped bacterium
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