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diph•the•roid(ˈdɪf θəˌrɔɪd, ˈdɪp-)
1. resembling diphtheria, esp. in the formation of a false membrane in the throat.n.
2. any bacterium, esp. of the genus Corynebacterium, that resembles the diphtheria bacillus but does not produce diphtheria toxin.
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