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cornicle

American  
[kawr-ni-kuhl] / ˈkɔr nɪ kəl /

noun

  1. any of various small, horn-shaped processes, especially one of a pair of tubes at the posterior end of the abdomen of aphids, from which a waxy fluid is emitted.


Etymology

Origin of cornicle

1640–50; < Latin corniculum little horn, equivalent to corn- (stem of cornū ) horn + -i- -i- + -culum -cle 1