diphtheria diphrelatic • diphtherial · · · Info · Definitions · Characters · · diphtheria · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing. · · Noun Definition 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074