/kawr"ni keuhl/ , n.
any of various small, horn-shaped processes, esp. one of a pair of tubes at the posterior end of the abdomen of aphids, from which a waxy fluid is emitted.
[ 1640-50; corniculum little horn, equiv. to corn- (s. of cornu ) HORN + -i- -I- + -culum -CLE 1 ]