what is ctenocephalides
ctenocephalides in Medicine. Ctenocephalides CtenÂ·oÂ·ceÂ·phalÂ·iÂ·des (tÄn'Å-sÉ-fÄl'Ä­-dÄz') n. A genus of fleas that includes species that are parasitic on dogs and cats; the species found on dogs can transmit tapeworm to humans.