What is (a) A stem or peduncle, as of certain barnacles and crinoids. (b) The narrow basal portion of the abdomen of a hymenopterous insect. (c) The peduncle of the eyes of decapod crustaceans called?

stalk — (Zoöl.) (a) A stem or peduncle, as of certain barnacles and crinoids. (b) The narrow basal portion of the abdomen of a hymenopterous insect. (c) The peduncle of the eyes of decapod crustaceans. (Webster's 1913.)

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