Where does “icterus” come from?

icterus (Latin) comes from Ancient Greek ἴκτερος, from Ancient Greek ὕδερος, from Proto-Indo-European úderos, from Proto-Indo-European úd-er-o-s, from Proto-Indo-European údteros, from Proto-Indo-European úd — out, outward.

icterus (Latin): a yellow bird, the sight of which was said to...