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diphtheroid

American  
[dif-thuh-roid, dip-] / ˈdɪf θəˌrɔɪd, ˈdɪp- /

adjective

Pathology.

  1. resembling diphtheria, especially in the formation of a false membrane in the throat.

noun

  1. any bacterium, especially of the genus Corynebacterium, that resembles the diphtheria bacillus but does not produce diphtheria toxin.

Etymology

Origin of diphtheroid

First recorded in 1860–65; diphther(ia) + -oid

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.