osteostracan

Từ điển Oxford Learners Wordfinder Dictionary

noun

extinct jawless fish of the Devonian with armored head
• Syn:
cephalaspid
• Hypernyms:
jawless vertebrate, jawless fish, agnathan
• Member Holonyms:
Osteostraci, suborder Osteostraci, Cephalaspida, suborder Cephalaspida