cecidium

noun
ce·​cid·​i·​um | \sə̇ˈsidēəm, sēˈ-\
plural cecidia\ -​ēə \

Definition of cecidium 

: gall especially : one caused by insects or mites used especially in combinations acarocecidium zoocecidium

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History and Etymology for cecidium

New Latin, from Greek kēkidion, diminutive of kēkid-, kēkis anything gushing out, dye, oak gall; akin to Old English hengest stallion, Old High German hengist, Old Norse hestr, Welsh caseg mare, Lithuanian šokti to leap, dance

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