English edit

Etymology edit

diphtheria +‎ -oid

Adjective edit

diphtheroid (not comparable)

  1. Of, pertaining to or resembling diphtheria.
  2. Of, pertaining to or resembling the diphtheria bacillus Corynebacterium diphtheriae.

Noun edit

diphtheroid (plural diphtheroids)

  1. Any bacterium that can cause diphtheria