HETEROSTRACAN as NOUN

1. Meaning
   • extinct jawless fish with the anterior part of the body covered with bony plates
   • of the Silurian and Devonian
   Hypernyms(s) heterostracan is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
   • jawless vertebrate (what does jawless vertebrate mean?)
   • jawless fish (what does jawless fish mean?)
   • agnathan (what does agnathan mean?)