noun
extinct group of armored fish-like vertebrates; taxonomy is not clear
• Syn: ↑Osteostraci, ↑Cephalaspida, ↑suborder Cephalaspida
• Hypernyms: ↑animal order
• Member Holonyms: ↑Ostracodermi, ↑order Ostracodermi
• Member Meronyms: ↑osteostracan, ↑cephalaspid
Useful english dictionary. 2012.