coccidioidin

noun
coc·​cid·​i·​oi·​din | \ -ˈȯid-ᵊn, -ˈȯi-ˌdin How to pronounce coccidioidin (audio) \

Medical Definition of coccidioidin

: 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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