yersinia
noun
yer·sin·ia
| \ yər-ˈsin-ē-ə
\
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Medical Definition of yersinia
1
capitalized
: a genus of gram-negative bacteria of the family Enterobacteriaceae that includes several important pathogens (as the plague bacterium, Y. pestis) affecting animals and humans and formerly included in the genus Pasteurella — see plague sense 2
2
: any bacterium of the genus Yersinia