n. A genus or formgenus of Schizomycetes or bacteria, by some authorities regarded as the same as Spirillum.n. [lowercase; pl. vibrios or vibriones (vib′ ri-ōz, vibri-ō′ nēz).] A member of this genus; a vibrion; a motile bacterium.n. [lowercase] An animalcule like or mistaken for a bacterium, and misplaced in the genus Vibrio: an old name of some minute nematoids, as those species of Tylenchus which infest wheat and cause ear-cockles.