Noun marginocephalian has 1 sense
  1. Marginocephalia, suborder Marginocephalia, marginocephalian - includes bone-headed (pachycephalosaurs) and horned (ceratopsian) dinosaurs
    --1 is a kind of animal order
    --1 is a member of Ornithischia, order Ornithischia
    --1 has members: suborder Pachycephalosaurus; Ceratopsia, suborder Ceratopsia
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