pipevine swallowtailn. a large North American swallowtail butterfly, Battus philenor, which has greenish-black forewings and iridescent bluish-green hindwings and feeds on the pipe vine.
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1905 W. J. HollandButterfly Bk. 315 Papilio philenor... (The Pipe-vine Swallowtail.)
1992 H. MitchellOne Man's Garden ix. 173 Recently at the National Arboretum I saw several pipevine swallowtails (which I have never seen in my garden) in garden-variety verbena flowers.