The story
- Late Latin · derived fromrinatrix
- English todayrinatrix
From Late Latin rinatrix (in Bartholomaeus Anglicus), apparently a misreading of Lucan 9.720 et natrix (“and the water snake”).
First known use, by meaning
- 14th–19th c. A type of water snake formerly thought to poison water.
Etymology from Wiktionary, CC BY-SA 4.0.