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cornicle

noun
cor·​ni·​cle | \ ˈkȯ(r)nə̇kəl\
plural -s

Definition of cornicle

: a little horn or horn-shaped process specifically : either of two protruding dorsal tubes in aphids that secrete a waxy fluid and were formerly believed to discharge honeydew

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History and Etymology for cornicle

Latin corniculum, diminutive of cornu horn

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