coe·lo·lep·i·da \ˌ ̷ ̷ ̷ ̷ˈlepədə\noun plural Usage: capitalized Etymology: New Latin, from Coelolepid-, Coelolepis, genus of ostracoderms (from coel- + -lepis) + -ida in some classifications: an order of very small scaly Silurian and Lower Devonian ostracoderms