spherulin

noun
spher·​u·​lin | \ ˈsfir-yə-lən, ˈsfer- \

Medical Definition of spherulin

: an antigen that is derived from a fungus of the genus Coccidioides (C. immitis) while in its endospore-producing phase and that is used similarly to coccidioidin

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to gather or build up little by little

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