selenelion
A lunar eclipse occurring as the Moon sets, simultaneously with sunrise.
This phenomenon is called a "horizontal eclipse" or, from a French term, "selenelion." ... In modern times, the first record seems to date from 1590, when the great astronomer Tycho Brahe saw a selenelion from his observatory ....
Where it comes from
French coinage, from the Ancient Greek σελήνη (selḗnē, “moon”) and ἥλιος (hḗlios, “sun”).
Adapted from the Wiktionary entry selenelion (CC BY-SA 4.0).