noun see: derm- Date: 1891 any of the early fossil jawless fishes of the Lower Paleozoic usually having a bony covering of plates or scales
OSTRACODERM
Meaning of OSTRACODERM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012