isopiptesis

Meanings

1. An isoline that joins points on a map where the individuals of a particular migratory species arrive at the same time each year.

Etymology

Refashioning of the earlier spelling isepiptesis, from German Isepiptesen used by Alexander von Middendorff in his 1855 work Die Isepiptesen Russlands, from iso- + Ancient Greek ἐπίπτησις (epíptēsis, “flying down upon”), from ἐπι- (epi-, “upon”) + πτῆσῐς (ptêsĭs, “flight”), from πέτομαι (pétomai, “fly”).