|īˌsepə̇(p)ˈtēsə̇s, |īˌze- noun
( plural isepipte·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