Dictionarydiph•the•roidPronunciation: (dif'thu-roid", dip'-), [key] —adj. Pathol. resembling diphtheria, esp. in the formation of a false membrane in the throat. —n. any bacterium, esp. of the genus Corynebacterium, that resembles the diphtheria bacillus but does not produce diphtheria toxin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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