pocosin /pəˈkoʊsən/ noun1 •(US) A low, wooded swamp in (especially coastal) Eastern Maryland, Virginia or the Carolinas; a palustrine wetland with deep, acidic peat soils.One has to go down "on all fours" to get below the dense tangle of vegetation. Each step in the soft peat is uncertain. The reward is a pocosin community full of wildflowers. — 2001 formspocosins