Medical Dictionary


noun coc·cid·i·oi·din \-ˈȯid-ən, -ˈȯi-ˌdin\

Medical Definition of coccidioidin

  1. :  an antigen derived from a fungus of the genus Coccidioides (C. immitis) while in its mycelial phase and used to detect skin sensitivity to and, by inference, infection with this organism—compare spherulin

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