Athecae
plural noun
Athe·cae
əˈthē(ˌ)sē
: a division usually made a suborder of Testudinata comprising turtles with the carapace separate from the internal skeleton and usually with greatly reduced ossification and represented among recent forms by the marine leatherback
athecan adjective or noun
-ēkən
Word History
Etymology
New Latin, from feminine plural of (assumed) New Latin athecus having no cover, from New Latin a- entry 2 + (assumed) New Latin -thecus (from Latin theca cover, sheath)