Search Result for "osteostracan": 
Wordnet 3.0

NOUN (1)

1. extinct jawless fish of the Devonian with armored head;
[syn: osteostracan, cephalaspid]



WordNet (r) 3.0 (2006):

osteostracan
    n 1: extinct jawless fish of the Devonian with armored head
         [syn: osteostracan, cephalaspid]