The story
- Ancient Greek · derived fromἄκοιλος“not hollow”
- English todayacoel
From group name Acoela, from Ancient Greek ἄκοιλος (ákoilos, “not hollow”).
First known use, by meaning
- from 20th c. A member of the order Acoela of marine flatworms, which lack a digestive cavity with definite walls.
Etymology from Wiktionary, CC BY-SA 4.0.