Wordnet 3.0
NOUN (1)
1. 
 small deciduous tree of eastern and central United States having dark green lyrate pinnatifid leaves and tough moisture-resistant wood used especially for fence posts; 
[syn: post oak, box white oak, brash oak, iron oak, Quercus stellata]
WordNet (r) 3.0 (2006):
Quercus stellata
    n 1: small deciduous tree of eastern and central United States
         having dark green lyrate pinnatifid leaves and tough
         moisture-resistant wood used especially for fence posts
         [syn: post oak, box white oak, brash oak, iron oak,
         Quercus stellata]