Noun iron oak has 2 senses
  1. post oak, box white oak, brash oak, iron oak, Quercus stellata - 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
    --1 is a kind of oak, oak tree
  2. canyon oak, canyon live oak, maul oak, iron oak, Quercus chrysolepis - medium-sized evergreen of southwestern United States and northwestern Mexico with oblong leathery often spiny-edged leaves
    --2 is a kind of live oak
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