noun
Etymology: post (I)
: any of several American oaks with tough moisture-resistant woods used especially for fence posts ; especially : a medium-sized oak ( Quercus stellata ) of the eastern and central United States that has a scaly fissured reddish brown bark, dark green lyrate pinnatifid leaves, and moderately large obtusely ovoid acorns — called also box white oak, brash oak, iron oak