Lewis & Short

Coela (ōrum, n.), Euboeae, Κοῖλα τῆς Εὐβοίας, a deeply-indented maritime region in Eubœa, Liv. 31, 47, 1; Val. Max. 1, 8, 10; hence this part of Eubœa is also called Coela Euboea, Val. Max. l. l.