is·ep·ipte·sis \|īˌsepə̇(p)ˈtēsə̇s, |īˌze-\noun (pluralisepipte·ses \-ēˌsēz\) Etymology: New Latin, from is- + epi- + Greek ptēsis flight, from petesthai to fly — more at feather : a line on a map or chart connecting localitites reached at one date by different individuals of a species of migratory bird