| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
pathogenic path·o·gen·ic (pāth'ə-jěn'ĭk) or path·o·ge·net·ic (-jə-nět'ĭk)
adj.
Having the capability to cause disease.
Producing disease.
Relating to pathogenesis.
A descriptive term for a thing or condition that can cause disease.