siphonapteran adjective 1noun 1forms 1 adjective1 •Of, pertaining to, or characteristic of the order Siphonaptera of fleas. noun1 •Any species of the order Siphonaptera, a flea.Absence of peripheral singlets, though with varying numbers of central singlets, is seen not only in mecopterans and siphonapterans but also in mycetophilid dipterans, and trichopterans. — 1987 formssiphonapterans
