diphtheroid

adjective
diph·​the·​roid | \ ˈdif-thə-ˌrȯid How to pronounce diphtheroid (audio) \

Definition of diphtheroid

 (Entry 1 of 2)

: resembling diphtheria

diphtheroid

noun

Definition of diphtheroid (Entry 2 of 2)

: a bacterium (especially genus Corynebacterium) that resembles the bacterium of diphtheria but does not produce diphtheria toxin

First Known Use of diphtheroid

Adjective

1861, in the meaning defined above

Noun

1908, in the meaning defined above

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The first known use of diphtheroid was in 1861

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Cite this Entry

“Diphtheroid.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/diphtheroid. Accessed 29 January 2020.

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More Definitions for diphtheroid

diphtheroid

adjective
diph·​the·​roid | \ ˈdif-thə-ˌrȯid How to pronounce diphtheroid (audio) \

Medical Definition of diphtheroid

 (Entry 1 of 2)

: resembling diphtheria

diphtheroid

noun

Medical Definition of diphtheroid (Entry 2 of 2)

: a bacterium (especially genus Corynebacterium) that resembles the bacterium of diphtheria but does not produce diphtheria toxin

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