Search Result for "atavist": 
Wordnet 3.0

NOUN (1)

1. an organism that has the characteristics of a more primitive type of that organism;
[syn: atavist, throwback]



WordNet (r) 3.0 (2006):

atavist
    n 1: an organism that has the characteristics of a more
         primitive type of that organism [syn: atavist,
         throwback]