IPA: /klɒˈstrɪdiəl/
KK: /klɑˈstrɪdiəl/
Relating to a type of bacteria known as Clostridium, which can cause various infections and diseases.
The doctor diagnosed the patient with a clostridial infection after reviewing the lab results.
Clostridial is derived from "clostridium" (from Greek "kloster", meaning spindle), which refers to a genus of bacteria that are rod-shaped and often form spores. The suffix "-ial" (meaning relating to) indicates that it pertains to or is characteristic of clostridia. Thus, clostridial means relating to the clostridium bacteria.
Think of 'clostridium' as referring to spindle-shaped bacteria, and remember that 'clostridial' means relating to these bacteria.