nonhierarchical

from WordNet (r) 3.0 (2006)

nonhierarchical
    adj 1: not classified hierarchically [syn: {nonhierarchical},
           {nonhierarchic}] [ant: {hierarchal}, {hierarchic},
           {hierarchical}]

from The Collaborative International Dictionary of English v.0.48

nonhierarchic \nonhierarchic\ nonhierarchical
\nonhierarchical\adj.
   Not arranged in a hierarchy. Opposite of {hierarchical}.
   [Narrower terms: {ungraded, unordered, unranked}]
   [WordNet 1.5]