Search Result for "heterostraci": 
Wordnet 3.0

NOUN (1)

1. extinct group of armored jawless fishes or fish-like vertebrate; taxonomy is not clear;
[syn: Heterostraci, suborder Heterostraci]



WordNet (r) 3.0 (2006):

Heterostraci
    n 1: extinct group of armored jawless fishes or fish-like
         vertebrate; taxonomy is not clear [syn: Heterostraci,
         suborder Heterostraci]